CO2 laserska optika

CO2 OPTICS CATALOG

JAPAN Ophir Japan Ltd. - OJ 4-384 Sakuragi,Omiya, Saitama-city, Saitama 330-0854 Japan Tel. 81-48-650-9966 Fax. 81-48-646-4155 e-mail: info@ophirjapan.co.jp www.ophiropt.com/jp U.S.A. Ophir Optics LLC. - OPI 1616 Osgood Street North Andover, MA 01845 USA Tel. 1-855-TOP-LENS (1-855-867-5367) Fax. 978-657-6056 e-mail: co2@ophiroptics.com www.co2optics.com

CO2 Optics Catalog 2011 - 2012

GERMANY Ophir Optronics GmbH – OPG Bismarckstraße 18, 31582 Nienburg, Germany Tel. 49-5021-60769-0 Fax. 49-5021-60769-18 e-mail: info@ophiropt.de www.ophiropt.de

INTERNATIONAL HEADQUARTERS Ophir Optronics Ltd. - OOL Science - Based Industrial Park Har Hotzvim, P.O Box 4502101 Jerusalem, 91450 Israel Tel. 972-2-548-4444 Fax. 972-2-582-2338 e-mail: co2@ophiropt.com www.co2optics.com

People and Products You Can Rely On

TABLE OF CONTENTS Ophir Optronics Thin Film Coating

About Ophir Tutorial Coatings Table

2 7 8-9

Cutting Head Optics

Tutorial Focusing Lenses

DuralensTM Black MagicTM Clear MagicTM EZ MountTM for Amada Machines EZ KitTM Focusing Lenses Meniscus Plano-Convex Meniscus Mounted Plano-Convex Mounted

13 15 16 17 18 19 20 21 25 29 30

Mounted Lenses General Specifications Parts

Beam Delivery Optics

Tutorial Mirrors General Specifications Parts

Zero Phase shift 90° Phase shift ATFR+Windows Telescope mirrors

35 36 38 41 43 44 45

Cavity Optics

Tutorial General Specifications Parts

End Mirrors Cavity Mirrors Output couplers

49 50 52 53 54

Maintenance

Cleaning and Handling

"Protecting your optic investment"

by Todd Jacobson "Good Mode Quality"

by Scott Kiser Methods for CO2 Optics

Wipes for Lens Cleaning and Cleaning Holders Lens Cleaning Instructions Polarizer Stress check Instructions

59

Cleaning Kit EZ CleanTM

EZ TestTM Comet ModeCheckÂŽ

60 62 64 65 66 67 68 69 71

OPHIR OPTRONICS

About Ophir Optronics

 Ophir is a Newport Corporation brand. (NASDAQ: NEWP) Â

With manufacturing facilities totaling 128,500 ft2, in North Andover, MA, USA, Bucharest, Romania and Jerusalem, Israel,

Established in 1976, Ophir Optronics is a global leader in preci-

and subsidiaries in Japan and Europe we manufacture and

sion infrared optics, photonics instrumentation and 3D non-

deliver large quantities of optics quickly and cost-effectively.

contact measurement equipment.

Ophir combines more than 700 scientists, engineers and tech-

The company develops, manufactures and markets top quality

nical support personnel, providing service to thousands of

products that are based on the most advanced technologies

customers worldwide.

and are renowned for their quality and reliability.

2

For latest updates please visit our website: www.co2optics.com

OPHIR OPTRONICS

About Ophir

Optics Group

Optics for Co2 Lasers

We provide: “The Best of All Possible Solutions”

Ophir Optronics produces a full range of Optics of unsur-

Ophir’s Optics Group designs and produces a full range of

passed quality for high power CO2 industrial lasers. Our superb replacement optics and OEM optics include:

precision IR optics for defense, security and commercial markets, as well as optics for high power CO2 laser machines.

Cutting Head Optics -

Areas of Expertise:

Mounted Lenses: EZ MountTM and EZ KitTM

• Optical Lens Assemblies for MWIR & LWIR, Cooled and

Beam Delivery Optics -

Uncooled Cameras

0° and 90° phase shift mirrors (silicon and copper), ATFR

• IR Optical Components (BTP)

mirrors, Telescopic mirrors as well as Windows.

• Optics for High Power CO2 Industrial Lasers

Cavity Optics -

Focusing Lenses: DuralensTM, Black MagicTM, Clear MagicTM

Output Couplers, End mirrors and Total reflectors

Our CO2 Optics Group produces a full range of OEM and

Maintenance -

replacement optics including beam-delivery and cavity op-

We also provide maintenance accessories such as:

tics as well as windows. Ophir provides the highest quality

Cleaning Kit, EZ CleanTM - wipes, EZ TestTM - Polarizers and Clean-

CO2 optics at the best price. The second largest OEM sup-

ing holders.

plier in the world, all manufacturing is done in-house using automated CNC technology assuring complete uniformity.

* Data and information in this catalog are provided solely for

Driven by innovation, we’ve produced a longer lasting lens,

informative purposes. Specifications are of typical values.

radioactive free coating, called Black MagicTM. Our commit-

Although we aim to keep Ophir catalogs accurate and up-to-

ment to the customer is second to none, with a global distri-

date, details may change without notice.

bution and support network. This unwavering commitment to

Ophir accepts no responsibility or liability whatsoever with

forward thinking helps keep us “a cut above the rest”.

regard to the information in this catalog.

For more information, visit www.co2optics.com

For the latest information please refer to our website: www.co2optics.com

For latest updates please visit our website: www.co2optics.com

3

THIN FILM COATING

For latest updates please visit our website: www.co2optics.com

THIN FILM COATING

Tutorial

Resonator Coatings:

The optical elements for CO2 lasers offer a great challenge for optical manufacturers. The need for high quality optical

• Output Couplers: 30%-70% (standard)

surfaces combined with low absorption coatings has left the

• End Mirrors: 99.5%-99.7%

market with only few manufacturers who meet the challenge.

• Folding Mirrors:

Ophir Optronics offers a wide selection of lenses and mirrors

• MMR

with high performance coatings that were tested by many

• MMR-A

laser producers. Ophir was chosen for quality by major OEM

• MMR-P

companies.

• PLM

Our substrates include ZnSe lens and output couplers, Si mir-

• PLM-W

rors, GaAs, Ge, end mirrors and also Cu mirrors. The optics are cleaned and packed in a clean room environment.

Lens Coatings:

Beam Delivery Coatings:

• AR Absorption <0.2% (standard) • Black MagicTM Absorption <0.15% (low absorption)

• MMR

• Clear MagicTM Absorption <0.13% (ultra low absorption)

• ATFR • 90° Phase Shift • Zero Phase Shift

For latest updates please visit our website: www.co2optics.com

7

THIN FILM COATING

Coatings Table

BEAM DELIVERY

ZPS

90PS

MMR

ATFR

%R @ 0º AOI@ 10.6µm

99.5

98.0

99.8

NA

* S-Pol @ 10.6µm

NA

NA

99.9

≥98.5

* P-Pol @ 10.6µm

NA

NA

99.7

≤1.5

* R-Pol @ 0.6328µm

80

80

40

80

Phase Retardation Tolerance

<2°

90°±2°

<2°

NA

* %R@45º AOI

8

For latest updates please visit our website: www.co2optics.com

THIN FILM COATING

Coatings Table

CAVITY OPTICS

MMR

MMR-A

MMR-H

MMR-P

PLM

PLM-W

99.8

99.8

99.7

NA

NA

NA

99.9

99.9

99.8

99.9

99.5

99.8

99.7

99.7

99.6

99.8

≤90

≤90

40

40

80

65

NA

NA

<2°

<2°

NA

<2°

NA

NA

For latest updates please visit our website: www.co2optics.com

9

CUTTING HEAD OPTICS

CUTTING HEAD OPTICS

Tutorial

Focal length and mounting distance

Spherical aberration

In general, there are two types of focusing lenses: planoconvex lenses which have one convex surface (convex = dome-like curvature) and one flat surface, and meniscus lenses which have one convex surface and one concave surface (concave = hollow curvature). In most laser cutting machines, meniscus lenses are used because they produce a smaller focus diameter (see next section). In some machines, plano-convex lenses are used because their production costs are a little bit lower.

Spherical aberration means that the focus position of the outer portion of the laser beam is closer to the lens than the focus position of the inner portion (see picture). As a consequence, the focus diameter is not zero, but has some extension which can be calculated by the following formulas:

For a laser user who thinks about replacing a plano-convex lens by a meniscus lens, it is important to check if the focus position can be adjusted correctly. Even if a plano-convex lens and a meniscus lens have same diameter, thickness and focal length, the focus position of the meniscus lens can be several mm higher if compared to the plano-convex lens.

Reason is that the focal length of a lens is defined as the distance between the focus and the so-called principal plane.

The principal plane is defined according to a scientific rule and is located somewhere inside the lens. For checking the position of the focus in a laser cutting head, it is much more useful to know the â&#x20AC;&#x153;Mounting distance" of the lens. It is defined as the distance between the edge of the lower surface and the focal plane and therefore connected directly to the position of the focus within the cutting head.

df = 0.0286 (din)3 / (FL)2 (plano-convex lenses)

df = 0.0187 (din)3 / (FL)2 (meniscus lenses)

df = focus diameter, din = diameter of incoming beam,

FL = focal length

Example:

din = 20 mm, FL = 3.75â&#x20AC;&#x153;:

>>> df = 0.025 mm (plano-convex lens)

>>> df = 0.017 mm (meniscus lens)

The example shows that meniscus lenses produce smaller focus diameters than plano-convex lenses. The difference is significant especially at large beam diameters and short focal lengths. In order to minimize this effect, meniscus lenses are used in most laser cutting systems. In most practical applications, however, there is a second and much more important effect which influences the focus diameter. It is called diffraction and described in the next section. din

If the mounting distance of a replacement lens is different from the mounting distance of the original lens, it might happen that the focus position is shifted such that it cannot be corrected within the adjustment range of the cutting head. On the other side, it is possible to extend the adjustment range by using lenses with different mounting distances.

For latest updates please visit our website: www.co2optics.com

din

df

13

df

CUTTING HEAD OPTICS

Tutorial

Diffraction

Absorption and thermal lensing

A laser beam is an electromagnetic wave and therefore has properties similar to water waves or sound waves. One consequence of this wave-like nature is that a laser beam cannot be focussed to a sharp point. Instead the focus has a spot size which can be calculated as follows:

During laser operation with several kilowatts, the focusing lens is heated because it absorbs a small portion of the laser power. Absorption takes place mainly in the AR coatings and at dirt on the lens. At a new clean lens with standard AR coating, absorption is typically 0.2% of the incoming laser power. A lens with Ophir’s Black MagicTM coating has absorption 0.15%. During use in a laser cutting machine, absorption increases gradually due to increasing amounts of dirt on the lower surface. When the lens needs to be replaced, absorption usually is in the range 0.3 to 0.4%.

df = (4/π) M2 λ FL / din

df = focus diameter, M2 = beam quality, λ =

laser wavelength,

FL = focal length of focussing lens, din =

diameter of incoming beam

Examples: (λ = 10.6 µm, M1 = 2)

din = 20 mm, FL = 7.5“

din = 20 mm, FL = 3.75“ >> df = 0.065 mm

Heating of the lens causes additional surface curvature due to thermal expansion and increases the refractive index of the lens material. As a consequence of these effects, the lens focal length becomes shorter, and the focus position cannot be predicted exactly because it depends on many parameters like laser power, intervals laser on/off, cleanliness of lens, and others. Therefore, use of lenses with reduced absorption can make the focal length more stable and therefore improve reliability of the cutting process.

>> df = 0.13 mm

First of all, the example shows that focus diameters are much larger than the values calculated in the section above. This means that in most cutting applications, spherical aberration can be neglected. Diffraction is therefore the most important effect concerning focus diameters.

If there are dirt particles on the lens, the lens material is not heated uniformly, but mainly at the areas close to these dirt particles. As a consequence, focusing properties become worse, focus diameter increases, and cutting quality decreases. So if a certain “critical" amount of dirt has accumulated on the lens, it needs to be replaced. However, it might still work fine at reduced laser power.

In general, the formula shows that by decreasing the focal length, the focus diameter is decreased as well, with the consequence that the intensity of the laser beam is increased.

As high laser intensity is useful in most cutting applications, focal length should be as short as possible. However, a short focal length has the disadvantage that the beam diameter increases rapidly above and below the focus. Therefore, maximal thickness of materials which can be cut efficiently is very limited, and the optimal focal length increases with increasing thickness of material.

14

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS

Focusing Lenses

High Quality Lenses for High Power CO2 Lasers Highlights: • Compatible with all major laser systems in the market • Approved and used by leading OEMs • Designed for high durability and accuracy - Manufactured by automated CNC technology to assure complete uniformity • Manufactured according to the highest precision specifications - Absorption ≤ 0.2% • All manufacturing is done in-house

For latest updates please visit our website: www.co2optics.com

15

DuralensTM

CUTTING HEAD OPTICS

Focusing Lenses

Black MagicTM

Low Absorption Lenses for High Power CO2 Lasers • Guaranteed absorption <0.15% - constant throughout the lens lifetime - Maximum focus stability • Toughest coating in the industry. Remarkable Durability - Best ability to withstand back spatter - Easier to clean and maintain - Resistant to humidity • Recommended and approved by leading OEMs - Used for all high powered CO2 lasers including those over 5KW • Radioactive free coating • Excels in cutting aluminum and stainless steel • Best cost-benefit ratio

16

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS

Focusing Lenses

Clear MagicTM - Transparent Ultra Low Absorption Lens for High-Power CO2 Laser Systems Ophir offers the lowest Guaranteed absorption for ZnSe lenses.

The Clear Magicâ&#x20AC;&#x2122;s maximum Absorption level will never exceed 0.13% - and is assured for each and every lens sold.

As Ophirâ&#x20AC;&#x2122;s Black MagicTM lens is known for high durability and long life expectancy, we have been focusing our efforts on developing a transparent ultra low absorption lens that duplicates the unique performance of the Black MagicTM lens while providing the benefits of a transparent coating.

The new and innovative Clear MagicTM maintained the top layer of the Black MagicTM, which offers better cleaning properties and the highest scratch resistance.

In addition, the Clear MagicTM allows the customer to see the HeNe beam on the work piece and to check thermally induced stress through the polarizing filters.

This coating is now available in 1.5" and 2" diameter for most popular OEM systems.

For latest updates please visit our website: www.co2optics.com

17

Clear MagicTM

CUTTING HEAD OPTICS

Mounted Lenses

EZ MountTM for Amada Machines

Ophir Optronicsâ&#x20AC;&#x2122; CO2 Optics Group Produces Full Line of Reusable Lens Mounts for Amada CO2 Laser Equipment EZ-MountTM enables operators to change a lens, without replacing the mount, on any Amada machine.

Without any screws or small springs to contend with, EZ-MountTM features a turn-to-open mechanism enabling quick, safe removal of lenses for on-the-spot cleaning, focal length adjustment or replacement. With EZ-MountTM, an O-Ring replaces the potentially toxic indium wire used in traditional mounts. It is also more cost-effective than traditional mounts because it is completely reusable and saves time on lens maintenance.

18

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS

Mounted Lenses

EZ KitTM

EZ KitTM The Ophir’s EZ kitTM is designed for the Amada users to sup-

The kit includes the following items:

ply yearly lens need.

Focusing Lens Holder – EZ MountTM

It comes in a convenient package to maintain and store the

4 Ophir’s Focusing Lenses – chosen by the user

items after using it.

Cleaning Lens Holder

For the benefit of our customer, there is a flexible lens

Finger cots

choice. You are allowed to choose 4 focusing lenses from our variety.

For latest updates please visit our website: www.co2optics.com

19

CUTTING HEAD OPTICS

General Focusing Specifications Lenses

Dimensions EFL Range

38-381mm

Edge Thickness

2-15mm

ET Tolerance

±0.1mm

Diameter Range

10-100mm

Diameter Tolerance

+0.0 / -0.1mm

Clear Aperture

≥90%

Surface Irregularity

0.5 F @ 0.633µm

Surface Figure

2 F @ 0.633µm

ETV

<0.025mm

AR Coating

Standard

LA

ULA

Transmission

>99.3%

>99.35%

>99.35%

Absorption

< 0.2%

< 0.15%

< 0.13%

Reflection

<0.2% per surface

<0.25% Per Surface

AOI

0°-15°

0°-15°

0°-15°

Spec are valid for Meniscus and Plano-Convex lenses

20

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS

Parts

Meniscus

Diameter

Focal Length Inch

Inch

mm

61526

1.0"

5.0"

0.10"

2.50

Meniscus

630737-117

1.1"

3.75"

0.08"

2.16

Meniscus

630397-117

1.1"

3.75"

0.08"

2.00

Meniscus

61528

1.1"

2.5"

0.09"

2.30

Meniscus

60995

1.1"

10.0"

0.11"

2.70

Meniscus

60866

1.1"

5.0"

0.11"

2.70

Meniscus

60866

1.1"

5.0"

0.11"

2.70

Meniscus

60924

1.1"

2.5"

0.12"

3.00

Meniscus

60700

1.1"

2.5"

0.17"

4.20

Meniscus

61157

1.1"

3.75"

0.17"

4.20

Meniscus

60699

1.1"

5.0"

0.17"

4.20

Meniscus

60699

1.1"

5.0"

0.17"

4.20

Meniscus

60909

1.1"

1.5"

0.20"

5.10

Meniscus

60262

1.1"

5.0"

0.20"

5.10

Meniscus

60262

1.1"

5.0"

0.20"

5.10

Meniscus

60262

1.1"

5.0"

0.20"

5.10

Meniscus

61837

1.1"

2.5"

0.24"

6.00

Meniscus

61819

1.1"

5.0"

0.24"

6.00

Meniscus

61819

1.1"

5.0"

0.24"

6.00

Meniscus

61818

1.1"

7.5"

0.24"

6.00

Meniscus

60746

1.5"

5.0"

0.09"

2.40

Meniscus

60746

1.5"

5.0"

0.09"

2.40

Meniscus

61525

1.5"

2.5"

0.12"

3.00

Meniscus

61951

1.5"

5.0"

0.12"

3.00

Meniscus

61851

1.5"

7.5"

0.12"

3.00

Meniscus

61851

1.5"

7.5"

0.12"

3.00

Meniscus

60973

1.5"

5.0"

0.16"

4.00

Optics Type

P/N

Meniscus

LA

ULA

Inch

LA

LA

LA

LA ULA

LA

LA

LA

For latest updates please visit our website: www.co2optics.com

21

Edge Thickness

CUTTING HEAD OPTICS

Parts

Meniscus

Diameter

Focal Length Inch

Inch

mm

1.5"

5.0"

0.16"

4.00

60799

1.5"

2.5"

0.24"

6.00

Meniscus

60603

1.5"

3.75"

0.24"

6.00

Meniscus

60603

1.5"

3.75"

0.24"

6.00

Meniscus

60260

1.5"

5.0"

0.24"

6.00

Meniscus

60260

1.5"

5.0"

0.24"

6.00

Meniscus

60260

1.5"

5.0"

0.24"

6.00

Meniscus

60602

1.5"

7.5"

0.24"

6.00

Meniscus

60602

1.5"

7.5"

0.24"

6.00

Meniscus

60602

1.5"

7.5"

0.24"

6.00

Meniscus

631094-117

1.5"

2.5"

0.24"

6.00

Meniscus

60617

1.5"

3.75"

0.28"

7.00

Meniscus

60617

1.5"

3.75"

0.28"

7.00

Meniscus

60618

1.5"

5.0"

0.28"

7.00

Meniscus

60618

1.5"

5.0"

0.28"

7.00

Meniscus

631371-117

1.5"

5.13"

0.28"

7.00

Meniscus

631371-117

1.5"

5.13"

0.28"

7.00

Meniscus

61960

1.5"

10.0"

0.29"

7.40

Meniscus

61960

1.5"

10.0"

0.29"

7.40

Meniscus

61960

1.5"

10.0"

0.29"

7.40

Meniscus

61962

1.5"

3.70"

0.29"

7.40

Meniscus

61962

1.5"

3.70"

0.29"

7.40

Meniscus

61962

1.5"

3.70"

0.29"

7.40

Meniscus

61982

1.5"

5.0"

0.29"

7.40

Meniscus

61982

1.5"

5.0"

0.29"

7.40

Meniscus

61982

1.5"

5.0"

0.29"

7.40

Meniscus

61983

1.5"

7.5"

0.29"

7.40

Optics Type

P/N

LA

Meniscus

60973

LA

Meniscus

ULA

Inch

LA

LA ULA

LA ULA

LA

LA

LA

LA ULA

LA ULA

LA ULA

22

Edge Thickness

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS Optics Type

P/N

LA

Meniscus

61983

LA

Meniscus

61983

Meniscus

61961

Meniscus

61961

Meniscus

61961

Meniscus

61014

Meniscus

61014

Meniscus

61171

Meniscus

61171

Meniscus

61171

Meniscus

61973

Meniscus

61973

Meniscus

60614

Meniscus

60614

Meniscus

631079-117

Meniscus

631079-117

Meniscus

631079-117

Meniscus

62709

Meniscus

62709

Meniscus

62709

Meniscus

60616

Meniscus

60616

Meniscus

60616

Meniscus

62710

Meniscus

62710

Meniscus

62710

Meniscus

61595

Parts

ULA

LA ULA

LA

LA ULA

LA

LA

LA ULA

LA ULA

LA ULA

LA

For latest updates please visit our website: www.co2optics.com

Diameter

Focal Length Inch

Inch

mm

1.5"

7.5"

0.29"

7.40

1.5"

7.5"

0.29"

7.40

1.5"

8.85"

0.29"

7.40

1.5"

8.85"

0.29"

7.40

1.5"

8.85"

0.29"

7.40

1.5"

5.0"

0.31"

8.00

1.5"

5.0"

0.31"

8.00

1.5"

7.5"

0.31"

8.00

1.5"

7.5"

0.31"

8.00

1.5"

7.5"

0.31"

8.00

1.5"

10.0"

0.35"

9.00

1.5"

10.0"

0.35"

9.00

1.5"

3.75"

0.35"

9.00

1.5"

3.75"

0.35"

9.00

1.5"

5.0"

0.35"

9.00

1.5"

5.0"

0.35"

9.00

1.5"

5.0"

0.35"

9.00

1.5"

5.0"

0.35"

9.00

1.5"

5.0"

0.35"

9.00

1.5"

5.0"

0.35"

9.00

1.5"

7.5"

0.35"

9.00

1.5"

7.5"

0.35"

9.00

1.5"

7.5"

0.35"

9.00

1.5"

7.5"

0.35"

9.00

1.5"

7.5"

0.35"

9.00

1.5"

7.5"

0.35"

9.00

1.5"

7.5"

0.39"

10.00

Inch

ULA

ULA

23

Meniscus

Edge Thickness

CUTTING HEAD OPTICS

Parts

Meniscus

Diameter

Focal Length Inch

Inch

mm

1.5"

7.5"

0.39"

10.00

60850

2.0"

5.0"

0.31"

8.00

Meniscus

61694

2.0"

5.0"

0.31"

8.00

Meniscus

61694

2.0"

5.0"

0.31"

8.00

Meniscus

61039

2.0"

7.5"

0.31"

8.00

Meniscus

61039

2.0"

7.5"

0.31"

8.00

Meniscus

61039

2.0"

7.5"

0.31"

8.00

Meniscus

62102

2.0"

10.0"

0.38"

9.60

Meniscus

62102

2.0"

10.0"

0.38"

9.60

Meniscus

60992

2.0"

10.0"

0.38"

9.60

Meniscus

60992

2.0"

10.0"

0.38"

9.60

Meniscus

63002

2.0"

12.5"

0.38"

9.60

Meniscus

61853

2.0"

3.75"

0.38"

9.60

Meniscus

60991

2.0"

5.0"

0.38"

9.60

Meniscus

60991

2.0"

5.0"

0.38"

9.60

Meniscus

60991

2.0"

5.0"

0.38"

9.60

Meniscus

60698

2.0"

7.5"

0.38"

9.60

Meniscus

60698

2.0"

7.5"

0.38"

9.60

Meniscus

60698

2.0"

7.5"

0.38"

9.60

Meniscus

61579

2.5"

7.5"

0.14"

3.50

Meniscus

61394

2.5"

5.0"

0.43"

11.00

Meniscus

61393

2.5"

7.5"

0.43"

11.00

Meniscus

61393

2.5"

7.5"

0.43"

11.00

Optics Type

P/N

LA

Meniscus

61595

LA

Meniscus

ULA

Inch

LA

LA ULA

LA

LA

LA ULA

LA ULA

LA

24

Edge Thickness

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS

Parts

Plano-Convex

Diameter

Focal Length Inch

Inch

mm

61013

1.0"

10.0"

0.12"

3.00

Plano-convex

61564

1.0"

12.5"

0.19"

4.80

Plano-convex

61829

1.0"

15.0"

0.19"

4.80

Plano-convex

60990

1.1"

5.0"

0.12"

3.00

Plano-convex

61161

1.1"

5.0"

0.16"

4.00

Plano-convex

61161

1.1"

5.0"

0.16"

4.00

Plano-convex

61162

1.1"

7.5"

0.16"

4.00

Plano-convex

61211

1.1"

5.0"

0.24"

6.00

Plano-convex

61210

1.1"

7.5"

0.24"

6.00

Plano-convex

60949

1.5"

7.5"

0.10"

2.50

Plano-convex

631020-117

1.5"

2.5"

0.11"

2.70

Plano-convex

60907

1.5"

3.5"

0.12"

3.00

Plano-convex

60935

1.5"

3.75"

0.12"

3.00

Plano-convex

60830

1.5"

5.0"

0.12"

3.00

Plano-convex

60830

1.5"

5.0"

0.12"

3.00

Plano-convex

61163

1.5"

5.0"

0.16"

4.00

Plano-convex

61163

1.5"

5.0"

0.16"

4.00

Plano-convex

61163

1.5"

5.0"

0.16"

4.00

Plano-convex

631026-117

1.5"

6.5"

0.16"

4.00

Plano-convex

61164

1.5"

7.5"

0.16"

4.00

Plano-convex

60770

1.5"

5.0"

0.24"

6.00

Plano-convex

60770

1.5"

5.0"

0.24"

6.00

Plano-convex

60784

1.5"

7.5"

0.24"

6.00

Plano-convex

60329

LA

1.5"

7.5"

0.24"

6.00

Plano-convex

61857

LA

1.5"

3.63"

0.28"

7.00

Plano-convex

61001

1.5"

5.13"

0.28"

7.00

Plano-convex

61001

1.5"

5.13"

0.28"

7.00

Optics Type

P/N

Plano-convex

LA

ULA

Inch

LA

LA

LA

LA ULA

LA

LA

For latest updates please visit our website: www.co2optics.com

25

Edge Thickness

CUTTING HEAD OPTICS

Parts

Plano-Convex

Diameter

Focal Length Inch

Inch

mm

1.5"

5.13"

0.28"

7.00

1.5"

5.13"

0.28"

7.00

1.5"

5.13"

0.28"

7.00

60885

1.5"

2.5"

0.29"

7.40

Plano-convex

60884

1.5"

3.75"

0.29"

7.40

Plano-convex

60883

1.5"

5.0"

0.29"

7.40

Plano-convex

60883

1.5"

5.0"

0.29"

7.40

Plano-convex

60883

1.5"

5.0"

0.29"

7.40

Plano-convex

60882

1.5"

7.5"

0.29"

7.40

Plano-convex

60882

1.5"

7.5"

0.29"

7.40

Plano-convex

60882

1.5"

7.5"

0.29"

7.40

Plano-convex

631409-117

1.5"

7.63"

0.30"

7.60

Plano-convex

60905

1.5"

5.0"

0.30"

7.60

Plano-convex

60905

1.5"

5.0"

0.30"

7.60

Plano-convex

60905

1.5"

5.0"

0.30"

7.60

Plano-convex

61827

1.5"

15.0"

0.31"

8.00

Plano-convex

62670

1.5"

5.0"

0.30"

7.60

Plano-convex

62670

1.5"

5.0"

0.30"

7.60

Plano-convex

62670

1.5"

5.0"

0.30"

7.60

Plano-convex

60906

1.5"

7.5"

0.31"

8.00

Plano-convex

60906

1.5"

7.5"

0.31"

8.00

Plano-convex

60906

1.5"

7.5"

0.31"

8.00

Plano-convex

62649

1.5"

7.5"

0.30"

7.60

Plano-convex

62649

1.5"

7.5"

0.30"

7.60

Plano-convex

62649

1.5"

7.5"

0.30"

7.60

Plano-convex

61002

1.5"

7.63"

0.31"

8.00

Plano-convex

61002

1.5"

7.63"

0.31"

8.00

Optics Type

P/N

Plano-convex

61001

Plano-convex

631371-117

Plano-convex

631371-117

Plano-convex

LA

ULA

Inch

ULA

LA

LA ULA

LA ULA

LA ULA

LA ULA

LA ULA

LA ULA

LA

26

Edge Thickness

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS

Parts

Plano-Convex

Diameter

Focal Length Inch

Inch

mm

1.5"

7.63"

0.31"

8.00

631116-117

2.0"

12.5"

0.38"

9.60

Plano-convex

60950

2.0"

7.5"

0.29"

7.40

Plano-convex

60950

2.0"

7.5"

0.29"

7.40

Plano-convex

62192

2.0"

10.0"

0.31"

8.00

Plano-convex

62192

2.0"

10.0"

0.31"

8.00

Plano-convex

62728

2.0"

5.0"

0.31"

8.00

Plano-convex

62728

2.0"

5.0"

0.31"

8.00

Plano-convex

62728

2.0"

5.0"

0.31"

8.00

Plano-convex

61003

2.0"

5.0"

0.31"

8.00

Plano-convex

61003

2.0"

5.0"

0.31"

8.00

Plano-convex

61003

2.0"

5.0"

0.31"

8.00

Plano-convex

62172

2.0"

6.16"

0.31"

8.00

Plano-convex

62729

2.0"

7.5"

0.31"

8.00

Plano-convex

62729

2.0"

7.5"

0.31"

8.00

Plano-convex

62729

2.0"

7.5"

0.31"

8.00

Plano-convex

61004

2.0"

7.5"

0.31"

8.00

Plano-convex

61004

2.0"

7.5"

0.31"

8.00

Plano-convex

61004

2.0"

7.5"

0.31"

8.00

Plano-convex

630910-117

2.0"

8.7"

0.31"

8.00

Plano-convex

630910-117

2.0"

8.7"

0.31"

8.00

Plano-convex

630736-117

2.0"

10.0"

0.32"

8.10

Plano-convex

630736-117

2.0"

10.0"

0.32"

8.10

Plano-convex

61432

2.0"

8.75"

0.33"

8.50

Plano-convex

61432

2.0"

8.75"

0.33"

8.50

Plano-convex

61432

2.0"

8.75"

0.33"

8.50

Plano-convex

630911-117

2.0"

10.0"

0.38"

9.60

Optics Type

P/N

Plano-convex

61002

Plano-convex

LA

ULA

Inch

ULA

LA

LA

LA ULA

LA ULA

LA ULA

LA ULA

ULA

ULA

LA

For latest updates please visit our website: www.co2optics.com

ULA

27

Edge Thickness

CUTTING HEAD OPTICS Optics Type

P/N

LA

Parts

ULA

Diameter

Focal Length Inch

Inch

mm

2.0"

10.0"

0.38"

9.60

2.0"

5.0"

0.38"

9.60

2.0"

5.0"

0.38"

9.60

2.0"

5.0"

0.38"

9.60

2.0"

5.18"

0.38"

9.60

2.0"

5.18"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.63"

0.38"

9.60

Inch

ULA

Plano-Convex

Edge Thickness

Plano-convex

630911-117

Plano-convex

61019

Plano-convex

61019

Plano-convex

61019

Plano-convex

61514

Plano-convex

61514

Plano-convex

60911

Plano-convex

60911

Plano-convex

61405

Plano-convex

61405

Plano-convex

61405

Plano-convex

61515

Plano-convex

61515

LA

2.0"

7.63"

0.38"

9.60

Plano-convex

61677

LA

2.0"

10.08"

0.39"

10.00

Plano-convex

630909-117

2.5"

8.75"

0.31"

8.00

Plano-convex

630909-117

2.5"

8.75"

0.31"

8.00

Plano-convex

61565

2.5"

8.75"

0.38"

9.60

Plano-convex

61565

2.5"

8.75"

0.38"

9.60

Plano-convex

61690

2.5"

10.0"

0.39"

10.00

Plano-convex

61690

2.5"

10.0"

0.39"

10.00

Plano-convex

61690

2.5"

10.0"

0.39"

10.00

LA ULA

LA

LA

LA ULA

ULA

LA

LA ULA

28

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS Optics Type

P/N

Parts

LA

Meniscus Mounted

Diameter

Focal Length Inch

Inch

mm

1.5"

5.0"

0.29"

7.40

1.5"

5.0"

0.29"

7.40

Inch

Edge Thickness

Meniscus Mounted

6521607

Meniscus Mounted

6521608

Meniscus Mounted

65063

1.5"

5.0"

0.29"

7.40

Meniscus Mounted

6514204

1.5"

5.0"

0.29"

7.40

Meniscus Mounted

6514204

1.5"

5.0"

0.29"

7.40

Meniscus Mounted

680004-002

1.5"

5.0"

0.29"

7.40

Meniscus Mounted

680004-003

1.5"

5.0"

0.29"

7.40

Meniscus Mounted

6521605

1.5"

7.5"

0.29"

7.40

Meniscus Mounted

6521606

1.5"

7.5"

0.29"

7.40

Meniscus Mounted

6514202

1.5"

7.5"

0.29"

7.40

Meniscus Mounted

6514202

1.5"

7.5"

0.29"

7.40

Meniscus Mounted

680003-002

1.5"

7.5"

0.29"

7.40

Meniscus Mounted

680003-004

1.5"

7.5"

0.29"

7.40

Meniscus Mounted

6516404

2.0"

10.0"

0.38"

9.60

Meniscus Mounted

6516404

2.0"

10.0"

0.38"

9.60

Meniscus Mounted

6516407

2.0"

10.0"

0.38"

9.60

Meniscus Mounted

6516407

2.0"

10.0"

0.38"

9.60

Meniscus Mounted

6516401

2.0"

5.0"

0.38"

9.60

Meniscus Mounted

6516401

2.0"

5.0"

0.38"

9.60

Meniscus Mounted

6516402

2.0"

7.5"

0.38"

9.60

Meniscus Mounted

6516402

2.0"

7.5"

0.38"

9.60

For latest updates please visit our website: www.co2optics.com

LA

LA

LA

LA

LA

LA

LA

LA

LA

LA

29

CUTTING HEAD OPTICS

Parts

Plano-Convex Mounted

Diameter

Focal Length Inch

Inch

mm

65045

1.5"

3.75"

0.29"

7.40

Plano-Convex Mounted

65120

1.5"

5.0"

0.29"

7.40

Plano-Convex Mounted

65120

1.5"

5.0"

0.29"

7.40

Plano-Convex Mounted

6514203

1.5"

5.0"

0.29"

7.40

Plano-Convex Mounted

6514203

1.5"

5.0"

0.29"

7.40

Plano-Convex Mounted

65121

1.5"

7.5"

0.29"

7.40

Plano-Convex Mounted

65121

1.5"

7.5"

0.29"

7.40

Plano-Convex Mounted

6514201

1.5"

7.5"

0.29"

7.40

Plano-Convex Mounted

6514201

1.5"

7.5"

0.29"

7.40

Plano-Convex Mounted

6521601

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

6521602

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

65024

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

65024

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

65101

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

65101

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

6514205

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

6514205

1.5"

5.0"

0.30"

7.60

Plano-Convex Mounted

680004-001

1.5"

5.0"

0.31"

8.00

Plano-Convex Mounted

680004-004

1.5"

5.0"

0.31"

8.00

Plano-Convex Mounted

6521603

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

6521604

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

65025

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

65025

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

65102

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

65102

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

6514206

1.5"

7.5"

0.31"

8.00

Plano-Convex Mounted

6514206

1.5"

7.5"

0.31"

8.00

Optics Type

P/N

Plano-Convex Mounted

LA

Inch

LA

LA

LA

LA

LA

LA

LA

LA

LA

LA

LA

LA

LA

30

Edge Thickness

For latest updates please visit our website: www.co2optics.com

CUTTING HEAD OPTICS Optics Type

P/N

Plano-Convex Mounted

680003-001

Plano-Convex Mounted

680003-003

Plano-Convex Mounted

65035

Plano-Convex Mounted

65035

Plano-Convex Mounted

6516405

Plano-Convex Mounted

6516405

Plano-Convex Mounted

65038

Plano-Convex Mounted

65038

Plano-Convex Mounted

6516403

Plano-Convex Mounted

6516403

Plano-Convex Mounted

6516406

Plano-Convex Mounted

6516406

For latest updates please visit our website: www.co2optics.com

Plano-Convex Mounted

Parts

LA

Diameter

Focal Length Inch

Inch

mm

1.5"

7.5"

0.31"

8.00

1.5"

7.5"

0.31"

8.00

2.0"

5.0"

0.38"

9.60

2.0"

5.0"

0.38"

9.60

2.0"

5.0"

0.38"

9.60

2.0"

5.0"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

2.0"

7.5"

0.38"

9.60

Inch

LA

LA

LA

LA

LA

LA

31

Edge Thickness

BEAM DELIVERY OPTICS

For latest updates please visit our website: www.co2optics.com

BEAM DELIVERY OPTICS

Tutorial

In the beam delivery section of a laser working machine, the laser beam is transferred from the laser cavity to the working head. In principle, two moveable mirrors would be sufficient in a 2D-machine for guiding the laser beam to any point on the worksheet. In modern 2D-machines and especially in 3Dmachines, however, the beam delivery section has additional functions which require additional mirrors with specific properties.

In order to optimize function of these mirrors, different substrate materials are used â&#x20AC;&#x201C; the most common ones are silicon(Si) and copper (Cu). Silicon mirrors have light weight and are therefore preferred in flying optics where high accelerations are needed. Copper has high thermal conductivity, and channels for cooling water can be included directly into the mirrors. Therefore, copper mirrors are preferred if best-possible cooling is important, for example in machines with very high laser power. The optical properties of a mirror (reflectance, phase shift, etc) are determined by its coating. So in order to realize different mirror functions, different coatings are needed.

For latest updates please visit our website: www.co2optics.com

35

BEAM DELIVERY OPTICS

Mirrors

Zero phase shift mirrors

Windows

In most laser machines, one or several mirrors are used to

Windows for CO2 lasers are used either for protecting sensi-

forward the laser beam from the cavity to the working head.

tive and/or expensive optics, or for separating areas with dif-

Usually, each mirror reflects the laser beam by an angle of

ferent gas pressures. In all applications, high transmittance

90°, corresponding to an angle of incidence of 45°. At these

and low absorption are needed in order to minimize distortion

mirrors, reflectance should be as high as possible in order

of the laser beam. Therefore, such windows usually consist

to minimize losses of laser power; in addition, phase shift

of ZnSe substrates with AR-coatings on both surfaces (same

between the s- and p-polarized components of the reflected

as focusing lenses).

beam should be as low as possible in order to avoid disturbing the polarization of the laser beam. Mirrors with such properties are called zero-phase-mirrors.

90° phase shift mirrors Most CO2 lasers produce a laser beam which has linear polarization. For cutting metal sheets, however, a beam with circular polarization is needed if the cutting properties have to be independent of cutting direction. For converting a beam with linear polarization into a beam with circular polarization, a 90°-phase-retarding mirror (also called lambda/4-mirror) can be used. This mirror has a special coating which produces a phase shift of 90° between the s-and p-polarized components of the reflected beam. If the incoming beam has both components with same intensity and phase (corresponding to linear polarization), the reflected beam has phase shift of 90° between both components (corresponding to circular polarization).

36

For latest updates please visit our website: www.co2optics.com

BEAM DELIVERY OPTICS

Mirrors

ATFR mirrors in

In some laser cutting processes, there is considerable

m

Back reflected P-Pol

B

ea

risk that some portion of the laser beam is reflected at the workpiece and returned into the laser cavity. There, it might

Turning mirror (0° phase shift)

Input S-Pol

disturb laser operation. In order to avoid this problem, a socalled ATFR mirror can be inserted in the beamline. Such a mirror has high reflectance (typically 99%) for s-polarized

90°-phase-retarder

radiation and low reflectance (typically less than 1%) for p-

Focusing lens

polarized radiation. workpiece

Telescope mirrors In many applications, the small diameter of the laser beam produced in the laser cavity is not convenient because the beam has high divergence and high power density. In order to avoid subsequent problems, the beam diameter can be increased by using a telescope consisting of two mirrors – one with a convex surface and one with a concave surface. Such telescope mirrors are usually made of copper. dout Mirror concave

Beam out

dout / din = Rcc / Rcx

Beam in

Mirror concave

din

For latest updates please visit our website: www.co2optics.com

37

Mirror distance:

0.5.Rcx

BEAM DELIVERY OPTICS

General Specifications

Si, Cu Zero Phase Shift Turning Mirrors Material

Si, Cu

Surface Quality

20-10 scratch and dig

Thickness Tolerance

±0.25mm

Diameter Tolerance

+0 / -0.12mm

Mechanical Wedge

<3’ (arc minutes)

Power

2F @ 0.633µm

Irregularity

1F @ 0.633µm

Phase Shift

0°±2°

Reflection

>99.5%

Absorption

<0.5%

AOI

45°

S1 / S2 Radius

Plano

Si, Cu 9O° Phase Shift Mirrors Material

Si, Cu

Surface Quality

20-10 scratch and dig

Thickness Tolerance

±0.25mm

Diameter Tolerance

+0.0 / -0.12mm

Mechanical Wedge

< 3’ (arc minutes)

Power

2F @ 0.633µm

Irregularity

1F @ 0.633µm

Phase Shift

90°±3°

Reflection

>98.0%

Absorption

<1.5%

AOI

45°

S1 / S2 Radius

Plano

For special mirror applications or other coating types please contact your local Ophir agent - www.co2optics.com

38

For latest updates please visit our website: www.co2optics.com

BEAM DELIVERY OPTICS

General Specifications

ZnSe windows Material

ZnSe

Surface Quality

20-10 scratch and dig

Thickness Tolerance

±0.25mm

Diameter Tolerance

+0.0 / -0.12mm

Mechanical Wedge

<3’ (arc minutes)

Power

1F @ 0.633µm

Irregularity

0.5F @ 0.633µm

Reflection

<0.25%

Absorption

<0.2%

Transmission

>99.3%

S1 / S2 Radius

Plano

For special mirror applications or other coating types please contact your local Ophir agent - www.co2optics.com

For latest updates please visit our website: www.co2optics.com

39

BEAM DELIVERY OPTICS

General Specifications

Si, Cu ATFR Mirrors Material

Si, Cu

Surface Quality

20-10 scratch and dig

Thickness Tolerance

+0.0 / -0.2mm

Diameter Tolerance

+0.0 / -0.12mm

Mechanical Wedge

< 3’ (arc minutes)

Power

1F @ 0.633µm

Irregularity

0.5F @ 0.633µm

Reflection Spol AOI 45°

≥90.0%

Reflection Ppol AOI 45°

≤1.5%

S1 / S2 Radius

Plano

Cu Telescope Mirrors Material

Cu

Surface Quality

40-20 scratch and dig

Thickness Tolerance

+0.0 / -0.1mm

Diameter Tolerance

+0.0 / -0.1mm

Mechanical Wedge

<3’ (arc minutes)

Power

2F @ 0.633µm

Irregularity

1F @ 0.633µm

Phase Shift

0°±1°

Reflection

>99.5%

Absorption

<0.5%

AOI

45°

For special mirror applications or other coating types please contact your local Ophir agent - www.co2optics.com

40

For latest updates please visit our website: www.co2optics.com

BEAM DELIVERY OPTICS Optics Type

Substrate

P/N

0° PS

Si

630321-117

0° PS

Si

0° PS

Zero Phase shift

Parts

Diameter

Edge Thickness

mm

Inch

mm

1.00"

25.4

0.118"

3.00

630065-117

1.50"

38.1

0.157"

4.00

Si

61061

1.75"

44.4

0.20"

5.08

0° PS

Si

61062

1.75"

44.4

0.375"

9.52

0° PS

Si

630714-117

2.00"

50.8

0.20"

5.08

0° PS

Si

630069-117

2.00"

50.8

0.375"

9.52

0° PS

Si

61811

2.00"

50.8

0.40"

10.16

0° PS

Si

62239

2.67"

67.9

0.80"

20.32

0° PS

Si

630390-117

3.00"

76.2

0.25"

6.35

0° PS

Si

630788-117

3.00"

76.2

0.375"

9.52

0° PS

Cu

61796

1.10"

27.9

0.236"

6.00

0° PS

Cu

631304-117

1.50"

38.1

0.24"

6.00

0° PS

Cu

61793

1.50"

38.1

0.24"

6.00

0° PS

Cu

631243-117

1.50"

38.1

0.31"

8.00

0° PS

Cu

61443

1.97"

50.0

0.375"

9.53

0° PS

Cu

631362-117

1.97"

50.0

0.20"

5.08

0° PS

Cu

61797

1.97"

50.0

0.36"

9.01

0° PS

Cu

61443

1.97"

50.0

0.375"

9.52

0° PS

Cu

630707-117

1.97"

50.0

0.393"

10.00

0° PS

Cu

630783-117

1.97"

50.0

0.393"

10.00

0° PS

Cu

61792

1.97"

50.0

0.98"

25.00

0° PS

Cu

631323-117

2.00"

50.8

0.20"

5.08

0° PS

Cu

631185-117

2.00"

50.8

0.375"

9.52

0° PS

Cu

630631-117

2.00"

50.8

2.13"

54.00

0° PS

Cu

630189-117

2.25"

57.1

0.393"

10.00

0° PS

Cu

631520-117

2.25"

57.1

1.25"

31.75

0° PS

Cu

61799

2.36"

60.0

0.24"

6.00

For latest updates please visit our website: www.co2optics.com

Inch

*WC

*WC

41

BEAM DELIVERY OPTICS Optics Type

Substrate

P/N

0° PS

Cu

630708-117

0° PS

Cu

0° PS

Zero Phase shift

Parts

Inch

Diameter

Edge Thickness

mm

Inch

mm

2.36"

60.0

0.393"

10.00

61121

2.36"

60.0

0.393"

10.00

Cu

631039-117

2.36"

60.0

0.590"

15.00

0° PS

Cu

** 631062-115

2.68"

68.0

1.340"

34.00

0° PS

Cu

631305-117

2.95"

75.0

0.590"

15.00

0° PS

Cu

631038-117

3.00"

76.2

0.590"

15.00

0° PS

Cu

631078-117

3.00"

76.2

0.250"

6.35

0° PS

Cu

631100-117

3.00"

76.2

0.500"

12.70

0° PS

Cu

631181-117

*WC

*WC

80x60

20.00

Coating ZPS (Zero Phase Shift). See coating reference pages 8-9 * WC= Water Cooled ** UC - Uncoated

42

For latest updates please visit our website: www.co2optics.com

BEAM DELIVERY OPTICS Optics Type

Substrate

P/N

90° PS

Si

61056

90° PS

Si

90° PS

90° phase shift

Parts

Inch

Diameter

Edge Thickness

mm

Inch

mm

1.00"

26.4

0.120"

3.05

630063-117

1.50"

38.1

0.157"

4.00

Si

630784-117

1.75"

44.4

0.375"

9.52

90° PS

Si

61055

1.97"

50.0

0.393"

10.00

90° PS

Si

630715-117

2.00"

50.8

0.200"

5.08

90° PS

Si

630066-117

2.00"

50.8

0.375"

9.52

90° PS

Si

61822

2.00"

51.8

0.400"

11.16

90° PS

Si

62238

2.68"

68.0

0.800"

20.32

90° PS

Si

630068-117

3.00"

76.2

0.250"

6.35

90° PS

Si

61208

3.00"

77.2

0.375"

10.52

90° PS

Cu

61802

1.50"

38.1

0.250"

6.35

90° PS

Cu

61409

1.50"

38.1

0.300"

7.50

90° PS

Cu

630781-117

1.97"

50.0

0.393"

10.00

90° PS

Cu

631322-117

2.00"

51.8

0.200"

5.08

90° PS

Cu

630706-117

2.00"

50.8

0.375"

9.52

90° PS

Cu

61800

2.00"

50.8

0.400"

10.16

90° PS

Cu

631073-117

2.00"

50.8

2.130"

54.00

90° PS

Cu

630630-117

2.25"

57.1

0.393"

10.00

90° PS

Cu

631519-117

2.25"

57.1

1.250"

31.75

90° PS

Cu

61384

2.36"

60.0

0.393"

10.00

90° PS

Cu

630914-117

2.36"

60.0

0.590"

15.00

90° PS

Cu

631380-117

2.68"

68.0

0.800"

20.32

90° PS

Cu

61821

2.95"

74.9

0.500"

12.70

90° PS

Cu

61262

2.95"

75.0

0.590"

15.00

90° PS

Cu

61264

3.00"

76.2

0.500"

12.70

90° PS

Cu

631182-117

*WC

*WC

*WC

*WC

80x60

Coating 90° PS. See coating reference pages 8-9 * WC= Water Cooled

For latest updates please visit our website: www.co2optics.com

43

20.00

BEAM DELIVERY OPTICS

Parts

ATFR

mm

Inch

mm

Surface S1

Coating

1.97"

50.0

0.394"

10.00

Plano

ATFR

631347-117

2.00"

50.8

0.375"

9.53

Plano

ATFR

62576

2.37"

60.0

0.590"

15.00

Plano

ATFR

Optics Type

Substrate

P/N

Mirror Cu ATFR

Cu

630915-117

Mirror Cu ATFR

Cu

Mirror Cu ATFR

Cu

Inch

Diameter

Edge Thickness

Windows Optics Type

Substrate

P/N

window

ZnSe

61786

window

ZnSe

window

LA

Inch

Diameter

Edge Thickness

mm

Inch

mm

1.00"

25.4

0.120"

3.05

62204

1.10"

27.9

0.118"

3.00

ZnSe

61787

1.50"

38.1

0.160"

4.06

window

ZnSe

61787

1.50"

38.1

0.160"

4.06

window

ZnSe

61788

2.00"

50.8

0.200"

5.08

window

ZnSe

61789

2.00"

50.8

0.375"

9.52

window

ZnSe

61789

2.00"

50.8

0.375"

9.52

window

ZnSe

62292

2.50"

63.5

0.350"

8.89

LA

LA

44

For latest updates please visit our website: www.co2optics.com

BEAM DELIVERY OPTICS

Parts

Telescope Mirrors

mm

Inch

mm

Surface Radius

1.97"

50.0

0.393"

10.00

2.25MCX

61813

1.97"

50.0

0.393"

10.00

1MCX

Cu

61814

1.97"

50.0

0.393"

10.00

1.68MCC

Telescope Mirror

Cu

61815

1.97"

50.0

0.393"

10.00

2MCX

Telescope Mirror

Cu

631196-117

1.97"

50.0

0.393"

10.00

3MCC

Telescope Mirror

Cu

61817

1.97"

50.0

0.393"

10.00

3.25MCC

Telescope Mirror

Cu

631141-117

1.97"

50.0

0.393"

10.00

1.4MCX

Telescope Mirror

Cu

631142-117

1.97"

50.0

0.393"

10.00

2MCC

Telescope Mirror

Cu

631162-117

1.97"

50.0

0.375"

9.52

1.73MCX

Telescope Mirror

Cu

631163-117

1.97"

50.0

0.375"

9.52

2.28MCC

Telescope Mirror

Cu

631196-117

1.97"

50.0

0.393"

10.00

3MCC

Telescope Mirror

Cu

631245-117

2.00"

50.8

0.393"

10.00

5.7MCX

Telescope Mirror

Cu

631246-117

2.00"

50.8

0.393"

10.00

6MCC

Optics Type

Substrate

P/N

Telescope Mirror

Cu

61812

Telescope Mirror

Cu

Telescope Mirror

For latest updates please visit our website: www.co2optics.com

Inch

Diameter

45

Edge Thickness

CAVITY OPTICS

For latest updates please visit our website: www.co2optics.com

CAVITY OPTICS

Tutorial

Output coupler and End mirror

In the cavity of a CO2 laser, CO2 molecules are excited by a gas discharge. This excitation energy is fed into a laser beam if it has sufficient intensity. For building up this intensity, mirrors are placed at both ends of the discharge such that the laser beam is reflected back and forth many times. Such an arrangement is called a laser cavity.

The output coupler usually has reflectance in the range 40% to 70%. In order to optimize power and spatial profile of the laser beam, the output coupler and rear mirror have optical surfaces with well-defined radii of curvature. As the output coupler transmits a high-power laser beam, it is made of ZnSe in order to minimize absorption and thermal lensing. The rear mirror usually has reflectance 99.5% which means that the transmitted laser beam has low power. However, as absorption in the coating is higher than in the output coupler, it is more important to use a substrate material with high thermal conductivity. Therefore, Germanium or Gallium Arsenide are used in most lasers.

In real cavities, both mirrors have some transmittance: one of them is the output coupler where the transmitted beam constitutes the useable laser beam; the other one is the rear mirror where the transmitted beam has very low intensity and is used for controlling purposes. For building up a laser cavity with output laser power of several kW, the total length of the discharge needs to be several meters. Covering this distance with one discharge is very problematic. Therefore, it is split up into several discharges working in line. In order to make the mechanical setup as compact as possible, the path of the laser beam within the laser cavity is â&#x20AC;&#x153;foldedâ&#x20AC;? several times by using suitable mirrors which are called total reflectors.

For latest updates please visit our website: www.co2optics.com

Total Reflectors Total Reflectors are quite similar to turning mirrors. However, durability of the coating is more critical because the total reflectors are exposed to the gas discharge and the extremely high laser power density inside the cavity. Therefore, the coating must have best-possible environmental resistance and low absorption in order to minimize thermal distortion.

49

CAVITY OPTICS

General Specifications

End Mirrrors Material

GE

GaAs

Surface Quality

20-10 scratch and dig

20-10 scratch and dig

Thickness Tolerance

+0mm / -0.1mm

+0mm / -0.1mm

Diameter Tolerance

+0mm / -0.1mm

+0mm / -0.1mm

Mechanical Wedge

< 3’ (arc minutes)

< 3’ (arc minutes)

Power

2F @ 0.633µm

2F @ 0.633µm

Irregularity

1F @ 0.633µm

1F @ 0.633µm

Reflection

99% / 99.5% / 99.7%

99.7%

Absorption

≤0.1%

≤0.1%

AOI

0°

0°

Side 2 Reflectivity

≤0.2%

≤0.2%

Clear Aperture

90%

90%

Si, Cu Total Reflectors Material

Si, Cu

Surface Quality

10-5 scratch and dig

Thickness Tolerance

+0.0 / -0.2mm

Diameter Tolerance

+0.0 / -0.1mm

Mechanical Wedge

<3’ (arc minutes)

Power

1F @ 0.633µm

Irregularity

0.5F @ 0.633µm

Reflection S-pol @10.6µm

99.9%

Absorption

0.1%

AOI

45°

For special mirror applications or other coating types please contact your local Ophir agent - www.co2optics.com

50

For latest updates please visit our website: www.co2optics.com

CAVITY OPTICS

General Specifications

Output Couplers Material

ZnSe

Surface Quality

10-5 scratch and dig

Thickness Tolerance

±0.2mm

Diameter Tolerance

+0 / -0.1mm

Mechanical Wedge

<3’ (arc minutes)

Power

1F @ 0.633µm

Irregularity

0.5F @ 0.633µm

S1 Reflection @ 10.6µm

30% to 70%

S1 Reflection Tolerance

±0.2%

S2 Reflection @ 10.6µm

≤0.2%

For latest updates please visit our website: www.co2optics.com

51

CAVITY OPTICS

Parts

End Mirrors

Inch

mm

Reflection S1

25.4

0.240"

6.00

99.60%

15MCC

Plano

1.00"

25.4

0.240"

6.00

99.50%

15MCC

Plano

631341-117

1.10"

27.9

0.220"

5.59

99.50%

15MCC

0.6MCX

Ge

61406

1.10"

27.9

0.220"

5.59

99.60%

10MCC

Plano

End Mirror

Ge

61407

1.10"

27.9

0.220"

5.59

99.60%

20MCC

Plano

End Mirror

Ge

61993

1.10"

27.9

0.220"

5.59

99.50%

10MCC

0.6MCX

End Mirror

Ge

630916-117

1.18"

27.9

0.240"

6.00

99.60%

30MCC

Plano

End Mirror

Ge

631104-117

1.50"

38.1

0.315"

8.00

99.70%

51.6MCC

Plano

End Mirror

Ge

61543

1.50"

38.1

0.310"

8.00

99.50%

15MCC

Plano

End Mirror

Ge

61544

1.50"

38.1

0.310"

8.00

99.50%

35MCC

Plano

Optics Type

Substrate

P/N

End Mirror

Ge

End Mirror

Diameter

Inch

mm

61382

1.00"

Ge

61436

End Mirror

Ge

End Mirror

52

Edge Thickness

Surface Radius S1 S2

For latest updates please visit our website: www.co2optics.com

CAVITY OPTICS

Parts

Cavity Mirrors

Inch

mm

Surface S1

Coating

25.4

0.118"

3.00

Plano

MMR

1.50"

38.1

0.157"

4.00

Plano

MMR

631294-117

1.50"

38.1

0.375"

9.52

Plano

PLM HR

Si

62391

1.50"

38.1

0.375"

9.52

Plano

MMR-P

Total Reflector

Si

62444

1.75"

44.4

0.375"

9.52

Plano

MMR

Total Reflector

Si

630780-117

2.00"

50.8

0.200"

5.08

Plano

MMR

Total Reflector

Si

61271

2.00"

50.8

0.375"

9.52

Plano

MMR

Total Reflector

Si

630917-117

2.00"

50.8

0.200"

5.08

Plano

DEMMR

Total Reflector

Si

630067-117

3.00"

76.2

0.250"

6.35

Plano

MMR

Total Reflector

Si

630331-117

3.00"

76.2

0.375"

9.52

Plano

MMR

Polarize Lock Mirror

Cu

631410-117 *WC

1.50"

38.1

0.790"

20.00

Plano

PLM HR

Total Reflector

Cu

630921-117

1.97"

50.0

0.393"

10.00

Plano

MMR

Total Reflector

Cu

630918-117

1.97"

50.0

0.393"

10.00

Plano

DEMMR

Polarize Lock Mirror

Cu

631053-117

1.97"

50.0

0.393"

10.00

100MCC

PLM-W

Total Reflector

Cu

631052-117

1.97"

50.0

0.393"

10.00

100MCC

MMR

Polarize Lock Mirror

Cu

631051-117

1.97"

50.0

0.393"

10.00

80MCC

PLM-W

Total Reflector

Cu

631050-117

1.97"

50.0

0.393"

10.00

80MCC

MMR

Total Reflector

Cu

630920-117

2.00"

50.8

0.200"

5.08

Plano

MMR

Total Reflector

Cu

630706-117

2.00"

50.8

0.375"

9.52

Plano

MMR

Total Reflector

Cu

630328-117

2.00"

50.8

0.375"

9.52

Plano

MMR-P

Polarize Lock Mirror

Cu

631160-117 *WC

2.00"

50.8

2.130"

54.00

Plano

PLM-W

Total Reflector

Cu

630922-117

2.36"

60.0

0.393"

10.00

Plano

MMR

Total Reflector

Cu

630782-117

2.36"

60.0

0.393"

10.00

Plano

MMR

Total Reflector

Cu

61809

3.00"

76.2

0.500"

12.7

Plano

MMR

Optics Type

Substrate

P/N

Total Reflector

Si

Total Reflector

Diameter

Inch

mm

61268

1.00"

Si

630064-117

Polarize Lock Mirror

Si

Total Reflector

AOI is 45 Reflection > 99.7% Coatings: MMR, MMR-A, MMR-H, MMR-P, PLM, PLM-W. see coating refence pages 8-9. * WC = Water Cooled

For latest updates please visit our website: www.co2optics.com

53

Edge Thickness

CAVITY OPTICS

Parts

Output Couplers

Inc

Diameter

mm

Edge Thickness Inch

mm

Reflection S1

Absorption

631109-117

1.10"

27.9

0.236"

6.00

40%

<0.12%

10MCC

5MCX

ZnSe

631048-117

1.00"

25.4

0.236"

6.00

40%

<0.10%

Plano

7MCC

Output Coupler

ZnSe

631049-117

1.00"

25.4

0.236"

6.00

50%

<0.10%

Plano

Plano

Output Coupler

ZnSe

631416-117

1.00"

25.4

0.236"

6.00

50%

<0.10%

30MCC

30MCX

Output Coupler

ZnSe

61435

1.00"

25.4

0.236"

6.00

65%

<0.08%

30MCC

30MCX

Output Coupler

ZnSe

61835

1.00"

25.4

0.236"

6.00

65%

<0.10%

30MCC

30MCX

Output Coupler

ZnSe

631164-117

1.10"

27.9

0.220"

5.60

65%

<0.12%

15MCC

10MCX

Output Coupler

ZnSe

631433-117

1.10"

27.9

0.220"

5.60

65%

<0.08%

20MCC

15MCX

Output Coupler

ZnSe

631165-117

1.10"

27.9

0.236"

6.00

50%

<0.05%

15MCC

7.5MCX

Output Coupler

ZnSe

631419-117

1.10"

27.9

0.236"

6.00

60%

<0.12%

20MCC

9MCX

Output Coupler

ZnSe

631112-117

1.10"

27.9

0.236"

6.00

60%

<0.12%

20MCC

7.5MCX

Output Coupler

ZnSe

61994

1.10"

27.9

0.220"

5.60

60%

<0.08%

10MCC

5MCX

Output Coupler

ZnSe

61410

1.10"

27.9

0.220"

5.60

50%

<0.05%

20MCC

15MCX

Output Coupler

ZnSe

61411

1.10"

27.9

0.220"

5.60

70%

<0.05%

20MCC

20MCX

Output Coupler

ZnSe

63003

1.10"

27.9

0.236"

6.00

50%

<0.06%

20.065MCC

12MCX

Output Coupler

ZnSe

61546

1.10"

27.9

0.236"

6.00

70%

<0.12%

Plano

Plano

Output Coupler

ZnSe

61643

1.18"

29.9

0.236"

6.00

50%

<0.10%

10MCC

10MCX

Output Coupler

ZnSe

630924-117

1.18"

30.0

0.236"

6.00

50%

<0.05%

30MCC

30MCX

Output Coupler

ZnSe

631107-117

1.50"

38.1

0.315"

8.00

40%

<0.12%

20MCC

10MCX

Output Coupler

ZnSe

61888

1.50"

38.1

0.315"

8.00

50%

<0.13%

51.6MCC

25MCX

Output Coupler

ZnSe

61545

1.50"

38.1

0.315"

8.00

60%

<0.13%

35MCC

15MCX

Output Coupler

ZnSe

61663

1.50"

38.1

0.236"

6.00

40%

<0.09%

15MCC

10MCX

Output Coupler

ZnSe

61542

1.50"

38.1

0.315"

8.00

40%

<0.13%

15MCC

7.5MCX

Optics Type

Substrate

P/N

Output Coupler

ZnSe

Output Coupler

LA

54

Surface Radius S1 S2

For latest updates please visit our website: www.co2optics.com

CAVITY OPTICS

Parts

Output Couplers

Inch

Diameter

mm

Edge Thickness Inch

mm

Reflection S1

Absorption

61883

1.50"

38.1

0.315"

8.00

40%

<0.13%

40MCC

20MCX

ZnSe

61887

1.50"

38.1

0.315"

8.00

40%

<0.13%

50MCC

25MCX

Output Coupler

ZnSe

61884

1.50"

38.1

0.315"

8.00

50%

<0.13%

40MCC

20MCX

Output Coupler

ZnSe

62056

1.75"

44.4

0.250"

6.35

35%

<0.10%

20MCC

10MCX

Optics Type

Substrate

P/N

Output Coupler

ZnSe

Output Coupler

For latest updates please visit our website: www.co2optics.com

55

Surface Radius S1 S2

MAINTENANCE

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57

MAINTENANCE

Protecting your optic investment, and your laser’s productivity

to see it, you can smell the difference. A clean lens will have no odor while a contaminated lens may take on an odor described as rotten eggs with the intensity depending upon the level of contamination.

By Todd Jacobson, Technical Consultant, Laser Maintenance Group

Contamination (regardless of the type) will cause thermal lensing.

This is a condition where the lens starts absorbing more of the precious power we pay extra for when buying our laser systems. The result is a focal point that drifts due to the temperature dependent index of refraction, ultimately causing dross on our parts. In response to a poor cut, the operator will adjust cutting parameters, in a futile effort to correct the problem. Unfortunately, he will continue to adjust, trying to compensate for a forever-changing focal point all the while getting further and further away from good parameters.

Your operator will eventually be frustrated, the manufacture gets sub standard parts and, or extra labor costs to correct the parts.

While struggling to get acceptable parts, production levels are reduced and good cutting parameters lost. Once the operator cleans or replaces the lens the suffering is only half over. Now the operator will have to adjust parameters settings in order to get them back to their original position, continuing the painful time lost to reduced production.

Reflecting back to 1989 when I entered into this career eager to apply my degree in Laser Technology, mainstream fabrication lasers were typical low powered 800 and 1200 watts. With today’s lasers now at 5000 and 6000 watts, I find there are still common areas of maintenance and problems between them. However, some of these issues are exponentially magnified with the higher wattage.

We will cover routine maintenance items that the majority of operators or maintenance personal can comfortably handle. However, until you have been properly trained, or even when in doubt you should always have a trained technician complete or assist you with the tasks.

We will start this issue with a topic that is commonly over looked, and explain the pros and cons of your decisions in handling this.

The Focusing lens, we all have them, but do we take care of them as we should?

Let’s start with the pros: One school of thought states, “Only clean your optic when you can see that it’s dirty.” doing so will minimize the chance of scratching the thin coating of thorium fluoride applied to the surface. Scratches will increase light absorption and scatter. Additionally, cleaning optics takes valuable time away from the production schedule.

If the lens is ignored long enough the optic will stress and end in a catastrophic failure. You can use a Polarized Stress tester to check for damage. Typical cutting lens are made of Zinc Selenide (ZnSe).

The unstressed crystal structure in a lens contains dipole moments whose sum at their vertex is equal to zero. In the stressed crystal, there are domains where the sum of the dipole moments are not zero and therefore are polarized. When viewed with a polarizer stress tester, these domains will look like shadow lines or darkened regions. The polarizer is setting up diffraction patterns for your eye to see.

On the opposing side, failing to periodically inspect the lens could have a multitude of unwanted and potentially costly results. Two conditions can exist; a visibly dirty lens, or a lens with a hydrocarbon film not seen by the naked eye. Although you might not be able

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Cleaning and Handling

59

MAINTENANCE

Cleaning and Handling

To detect stress regions in the lens, place the lens between the polarized stress tester and hold in front of a good light source then slowly rotate the assembly 360 degrees looking for dark regions or distinct patterns.

Catastrophic failure will turn the ZnSe lens into a dangerous yellow powder. This powder is a serious health hazard requiring immediate evacuation of the area. Please refer to optic manufactures such as Ophir Optic’s MSDS for a complete report. Besides the health issue, your system will require extended down time and costly repair to thoroughly clean the debris from your beam delivery guide and undoubtedly replace burned components in the cutting head.

Good Mode Quality, It’s Not Rocket Science

One of the biggest factors in determining your lens inspection interval is the type of materials you process. This interval should be frequent enough to provide a consistent process therefore reducing your hourly costs. Lens inspection should be one of the first things your operator checks when there are problems with the cut quality.

It’s time well spent considering the consequences if you do not.

Before we start discussing mode quality we should explain what we mean by “mode.” The term mode as it applies to lasers is short for Transverse Electromagnetic Mode. Light traveling through free space will make a TEM mode since it has no electric or magnetic field in the direction of propagation. It’s used to basically describe the shape of your laser beam. Lower order modes work best for laser cutting applications since they tend to focus better. This is due to the fact they have less complexity or fewer points to focus than do the higher order modes. The lowest order mode or TEM00 is called a Gaussian mode. It’s from here that the other modes will build from.

By Scott Kiser, Technical Consultant, Laser Maintenance Group It doesn’t matter how good your operators and maintenance staff are. It doesn’t matter how new or powerful your laser center is. It doesn’t matter that you use the best consumables, or have the best programming software. Sound true? Of course not, except in one case. If your resonator’s mode quality is poor none of the above will get you to cut good parts on your laser center. Well then what determines if your mode is good or bad?

Mode quality is defined differently by almost every laser OEM. They each have their own ways to determine what a good mode is. Most will place a block of acrylic a specified distance from the resonator and fire the raw beam into the block for a set period of time. Others will use thermal blocks to observe the shape of the beam. Still yet a few others tune for peak power and graph out all sorts of mirror combinations. In any case measurements are taken, calculations made, tolerances are taken into account and a decision is made whether it’s good or not. Every time I tune a mode, I am reminded of a quote

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MAINTENANCE

Cleaning and Handling

from an optical engineer at one of the biggest laser manufacturers.

I was a brand new service tech, and the mode we shot was a TEM10.

No matter what I did I could not get a TEM 01* like I was trained for. I called for help, and after much abuse I was informed that, “All that matters is symmetry! It’s not rocket science you know!” Turned out he was right. When I finished, the laser center cut parts at the rated feed rates and with superb edge quality.

Anytime you change optics in your resonator your mode will have to be re-evaluated, and most likely corrected. Start off by using only high quality optics. Refurbs, reconditioned, or low quality optics will result in disappointing or short lived mode quality. When you’re done tuning make sure your mode is symmetrical. If it leans, has interference rings, or any asymmetry, fix it now before you move on. Symmetry is critical since once the lens focuses the beam it needs to consistently present itself to the material no matter which direction you are cutting. If your mode leans it will cut well in one direction, and poorly in another. No amount of focusing or parameter adjustments will solve this problem.

Settling for a marginal mode will result in wasted time. Part quality and production will suffer until it is done correctly. Next time you have your service tech adjust the mode, go stand with him and look at it together. Just like any other aspect of the laser maintenance, quality is paramount. Make sure your mode is good. Remember ‘symmetry’ and you will be fine.

Here are a few of the calculations the physicists use to measure and predict the different orders of modes in cylindrical cavities: I’m starting to now wonder if it’s not “Rocket Science” it must be close.

I’m just glad tuning a good mode is not.

Before I wrote this article I reviewed some of the information on modes in an effort to be technically accurate, and to explain it in terms the rest of us normal people use.

For latest updates please visit our website: www.co2optics.com

61

MAINTENANCE

Cleaning and Handling

Methods for CO2 Optics

General Precautions 1. Coated surfaces should never be touched. Always hold the optic element by its sides.

2. Always wear powder-free finger cots or latex gloves when handling the optics. Bare hands might leave oils and dirt, which will damage their performance.

3. Do not use any tools or sharp objects when handling the optic element or when removing it from its packaging.

4. Prepare a clean and smooth work surface that is free of oils, grease, dirt, etc.

5. Optic elements will easily scratch when placed on hard surfaces. Once the optic is unpacked, carefully place it on the lens tissue into which it was originally wrapped.

Then place the tissue and the lens on a soft cloth or on the foam in the package.

The optic elements were cleaned and packaged in a clean and controlled environment at Ophir and should be ready to install in the laser machine. If an unpacked new optic element does not appear to be clean or seems to have a defect, please contact your local Ophir agent.

Method A: Condition of lens: Dust or small loose particles on the surface Cleaning method: 1. Use a small air bulb to gently blow off dust and debris. Do not use compressed air from a compressor as it is not a â&#x20AC;&#x153;cleanâ&#x20AC;? source of air and can contaminate the surface.

2. Gently place the provided optical-grade rice paper on the optic element. Slightly wet the paper with drops of Propanol/Ethanol (CP grade), using a pipette, and gently pull the paper toward the dry side away from the element, until there is no contact between them.

The following cleaning methods are for all optic elements The Black MagicTM DuralensTM should be treated with the same care and by the same methods as the standard AR coated CO2 Optics.

If this method is not successful, proceed to Method B

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MAINTENANCE

Method B: Condition of lens: Fingerprints, oil, other visual contaminants

Methods for CO2 Optics

Method C: Aggressive Cleaning Attention: This method is to be used only after trying methods A and B. In the event that you have completed steps A and B and the optic element is still contaminated please contact your local Ophir Dealer for further instructions.

Cleaning method: 1. Use a new clean cotton ball or cotton swab.

2. Dampen cotton with Propanol/Ethanol (CP grade). The cotton must not be dry.

3. Slowly and gently wipe the element in a regular pattern.

Do Not scrub the surface (scrubbing might damage the coating or the element itself). Gently wipe element in “S” motion.

4. If the surface is left with wipe marks, wipe it at a slower rate. When finished no streaks should be visible.

Condition of lens: Deteriorated performance and severe signs of contamination.

The aggressive cleaning will usually be needed due to heavy usage of the lens. However, certain types of contamination can not be removed and require replacing the optic element.

Method B (II): Condition of lens: Moderate contamination (spittle, oils)

Cleaning method: This method might erode the surface of the optics. If a change of surface color is noticeable stop polishing immediately.

1. Use a new clean cotton ball or cotton swab.

2. Dampen cotton with polishing compound (about 5 drops).

3. Gently and briefly wipe optics in “S” motion. Avoid pressing down the cotton or scrubbing the surface.

4. Wet a new cotton ball or swab with Propanol/Ethanol.

Gently but thoroughly swab the surface (do not allow it to dry).

5. Examine the surface under light in front of black background. Remove remaining residue by repeating step 4 until surface is clean.

Cleaning method: 1. Use a new clean cotton ball or cotton swab.

2. Dampen cotton with acetic acid (or vinegar) with 6% acidity. The cotton must not be dry.

3. Slowly and gently wipe the element in a regular pattern.

Do Not scrub the surface (scrubbing might damage the coating or the element itself). Gently wipe element in “S” motion.

4. If the surface is left with wipe marks, wipe it at a slower rate. When finished no streaks should be visible.

5. Slightly wet the provided optical-grade rice paper with drops of Propanol/Ethanol (CP grade), using a pipette and gently pull the paper toward the dry side away from the element, until there is no contact between them, until the residue of acetic acid has been removed.

For latest updates please visit our website: www.co2optics.com

Cleaning and Handling

63

MAINTENANCE

Cleaning Kit

This Cleaning Kit Includes:

EZ Cleaning Kit is designed to prolong the life of CO2 laser optics used in harsh industrial environments.

• • • • • •

Ophir’s EZ Kit for cleaning CO2 laser optics was developed specifically for High Power CO2 Lasers. Cleaning can help prevent damage to the coatings and substrate to prolong the lens’ life.

Providing complete, step by step cleaning instructions, the EZ Cleaning Kit for High Power CO2 Laser Optics includes

Air bulb Polishing compound (Alumina Oxid Polish) Dispensers for Propanol and cleaning fluid Finger cots Cotton balls Lens tissue (optical grade rice paper)

premeasured dispensers for: Alcohol, vinegar and polishing formula for hard to remove spatters and contaminations, as well as lens paper, cotton swabs and finger cots for safe handling.

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MAINTENANCE

Ophir Optronicsâ&#x20AC;&#x2122; CO2 Optics Group Introduces EZ-CleanTM, The First Disposable Wipes for Laser Optics

Ophir offers cleaning holders, the EZ way to clean your optics without touching its surfaces. Simply place the optic on one holder, clean the first surface, then place the second holder on top, turn it all upside-down and clean the second surface.

EZ-CleanTM, an innovative disposable wipe for the routine cleaning of optical High power CO2 laser lenses. The result of many months of research and testing, EZ-CleanTM has been developed specifically for CO2 laser optics. Composed of special non-scratch fabric, the wipe deposits a pre-measured amount of quick-drying cleaning fluid that leaves no residue.

The EZ-CleanTM package comes with 24 ready-to-use wipes, in which one wipe cleans one lens in a matter of seconds.

For latest updates please visit our website: www.co2optics.com

EZ CleanTM Wipes for Lens Cleaning and Cleaning Holders

65

MAINTENANCE

EZ CleanTM Lens Cleaning Instructions

Step 1: Separate one wipe

Step 2: Take out the folded wipe

Step 3: Using an "S" motion, wipe from top to bottom

Step 4: Turn the lens upside down

Step 5: Turn the wipe to the other side

Step 6: Using an "S" motion, wipe from top to bottom

warning: cleaning liquid is flammable; keep package away from hot surfaces

Step 7: Properly dispose the wipe and package

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MAINTENANCE

Ophir EZ Test TM

EZ TestTM

The Ophir EZ TestTM system will allow you to evaluate the stress within the lens so that you can quickly determine if you need to change it immediately, or if the lens has more life left in it and just needs a cleaning.

In order to maintain the best cutting environment for your laser machine, you need to run a lens that is in optimum condition. The Ophir EZ TestTM lens polarizer will let you look at the

A CO2 laser lens is a critical component to your cutting process. Ophir Optics manufactures a high quality CO2 optic to assist you in getting the best cut out of your laser. We take in pride in our products.

But even the best of products eventually wear out. In the case of a laser lens, if you do not pay attention to the condition of the lens, it can end in costly repairs and downtime.

You know that a lens can fail due to thermal stress or contamination, but how can you tell when a lens is at the end of its life or just needs a cleaning?

Ophir offers an ingenious and simple solution. The Ophir EZ TestTM is a tool designed to determine the condition of your CO2 lens.

lens and make that determination.

Polarizers set for lens stress inspection

Lens with stress

For latest updates please visit our website: www.co2optics.com

Polarizers

Lens without stress

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MAINTENANCE

EZ TestTM

Stress Check Instructions

Step 1: Remove the protective layer of the polarizer from both sides

Step 2: Repeat step 1 for the second polarizer

Step 3: Place the polarizer in the cleaning holder's dedicated slot

Step 4: Repeat step 3 for the second polarizer

Step 5: Place the lens in one of the cleaning holders

Step 6: Place the second holder on top of the other side of the lens

Step 7: Twist the top cleaning holder 90째 left to view & inspect the lens for stress

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For latest updates please visit our website: www.co2optics.com

MAINTENANCE

CW power: Comet 10K-HD - 200W to 10KW Ophir now offers the Comet laser power probe series that is simple to use, economical but also highly accurate.

It operates by measuring the heat rise from a 10 second exposure to a laser beam and thereby calculates the laser power. It has a sophisticated algorithm to take into account the heat loss due to the Comet temperature and thus can give accurate readings even if the Comet is hot before the measurement. This allows you to take several measurements before cooling the probe with water.

Recommended Use: Industrial Lasers.

Special Features: Accurate, simple to use and inexpensive

For latest updates please visit our website: www.co2optics.com

69

Comet

MAINTENANCE

Model

Comet 10K HD

Power measurement range

200W to 10,000W

Spectral range

CO2

Absolute calibration accuracy at calibrated wavelengths

±5%

Repeatability

±1% for same initial temperature

Linearity with power

±2 % from 1KW to 10KW

Number of readings before probe must be cooled (for 25°C 1KW starting temp.)

3KW 4KW 10KW

Comet

4 3 2 1

Absorber: ∅110mm dia x 87mm thick. Max beam size 55mm. Length: 350mm

Dimensions Maximum Average Power Density KW/cm2

power 1 KW 2 KW 3 KW 5 KW 10KW

Beam dia <40 10 10 8 6 4

Maximum Energy Density J/cm2

Pulse width <100ns 10µs 1ms 10ms

1 3 30 150

Beam dia >40 7 6 5 3 2

Time to reading

Initial reading 30s after exposure, final reading 70s after exposure

Weight

1.2Kg

Temperature compensation

Temperature compensated to give accurate readings independent of starting probe temperature

Maximum permitted probe temperature

70°C before measurement, 140°C after measurement

Swivel mount

Fixed position

Display

2x8 character LCD. Character height 5mm. CE approved

Operation modes:

AUTO: Automatic measurement with laser set to 10s timed exposure. Unit senses temperature rise and measures automatically.

MANUAL: User places probe in front of beam for 10s. Unit beeps to indicate start and stop measurement points.

History

Stores last three readings

Calibration

Can be recalibrated by user

Battery

2 x AA. Lifetime in normal use approximately 1 year.

Ordering Information

Item

Description

Ophir P/N

Comet 10K HD V2

Hand held power probe for 200 – 10,000W with conical absorber for high damage threshold

Z02706

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For latest updates please visit our website: www.co2optics.com

MAINTENANCE

• Quality Cutting, Marking, Drilling & Ablating Require More Than Consistent Laser Power

ModeCheck® A New Method to Assure the Performance of High Power CO2 Lasers ModeCheck eliminates operator exposure to acrylic mode burn hazards while improving product quality and manufacturing efficiency.

• Instantaneously “see” and measure the beam - reduce set-up time between jobs • Real-time “mode burns” - eliminate hazardous acrylic vapors • Optimize laser efficiency - reduce cost per part • Predict laser preventative maintenance - increase manufacturing efficiency • Up to 5kW CO2 ModeCheck is designed for the industrial parts manufacturer to reduce the time it takes to change over between different jobs. The user can quickly place the ModeCheck in front of the laser and see and measure, in real-time, the laser beam profile to confirm optimal laser performance. In addition, and when used periodically, the user can compare measurement changes from the same set-up and make necessary laser adjustments, keeping the laser output constant for the same job from day-to-day. Over time the user will be able to see and measure laser degradation to predict and advance schedule down-time needed for periodic maintenance.

Measurements: In addition to both 2D and 3D graphical image display and save, the following measurements are made from each image: Beam Widths and Diameters Beam Position Stability Peak Power Density Beam Centroid Location Elliptical Analysis with Major Axis Orientation

Laser Beam in

It’s just this easy.

1. Remove Focusing optic.

2. Locate the beam center with pointing beam or similar device.

3. Place ModeCheck in beam center.

4. Turn on Laser.

5. Instantly see, measure and electronically store the beam characteristics.

Pass-Through Beam Out

For latest updates please visit our website: www.co2optics.com

71

MAINTENANCE

Optional Accessories:

ModeCheckÂŽ A New Method to Assure the Performance of High Power CO2 Lasers tom of ModeCheck for mounting the Power Meter Head or Beam Dump.

A PC with is required to run the ModeCheck imaging software. The camera is powered over the USB cable that connects the computer to ModeCheck.

A ruggedized storage/carrying case is highly recommended for safe and efficient handling.

One must manage the pass-through laser beam by collecting the beam using either a power meter or beam dump. We recommend using a power meter as the additional measurement information will assist in managing laser optimization. Note that any beam dump or power meter large enough to handle 5kW will require water cooling. There are holes on the botModel

ModeCheck

Laser Input Power

500-5000 Watts

Input Clear Aperture

50mm (~2")

Beam Width

5mm - 30mm

Pick-off Percent

0.5, 1, 2, 4% sampling wands; user replaceable

Damage Threshold

27 - 36 W/cm2

Camera

1/3" format CMOS, 640x480, 6um pixel, 8bit, CS-mount, USB2

Lens

25mm C-mount

Cooling

Built in Fan (water required for the optional beam dump or optional power meter sensor)

uV Light Source

LED array

Software

ModeCheck v5.0

Power Requirements

Input: 100-240 Vac, 50-60Hz, 1.5A Output: 12Vdc, 5.0A, w/power jack, UL listed and CE compliant universal power supply included Camera is powered over the USB port

Dimensions

13"x 6.7"x 9.5" / 242mm x 330mm x 171mm Not including handle and cabling or any options.

Weight

~8 lbs 3.6kg

Beam Dump (optional)

Water cooled and rated for 5kW total power

Power Meter (optional)

5000W-SH; up to 5kW total power / 10KW-SH-V2; up to 10kW total power

Laptop Computer

Provided by user; Windows XP Pro, Vista-32 or Windows 7 is required

Compliance

Unit meets CE and RoHS requirements

Ordering Information Item

Description

P/N

MODECHECK CO2-5KW

ModeCheck, CO2 sampler for 10.6Âľm beams up to 5KW, beam width up to 30mm

SP90211

Beam Dump; 5kW

Beam dump for up to 5kW continuous, includes mounting bracket, requires continuous water flow.

SP90224

5000W-SH

Power sensor, measure CO2 power up to 5000W; water cooling needed.

7Z02119

Mounting Hardware, 5000W detector

Mounting hardware for 5kW power sensor. Required when ordering the 5000W-SH sensor

SP90212

10KW-SH-V2

Power sensor, measure CO2 power up to 10,000W; water cooling needed.

7Z02645

Mounting Hardware, 10,000W detector

Mounting hardware for 10KW power sensor. Required when ordering the 10KW-SH-V2 sensor

SP90213

ModeCheck storage/carrying case

Ruggedized ModeCheck storage/carrying case

SP90227

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For latest updates please visit our website: www.co2optics.com

CO2 OPTICS CATALOG

JAPAN Ophir Japan Ltd. - OJ 4-384 Sakuragi,Omiya, Saitama-city, Saitama 330-0854 Japan Tel. 81-48-650-9966 Fax. 81-48-646-4155 e-mail: info@ophirjapan.co.jp www.ophiropt.com/jp U.S.A. Ophir Optics LLC. - OPI 1616 Osgood Street North Andover, MA 01845 USA Tel. 1-855-TOP-LENS (1-855-867-5367) Fax. 978-657-6056 e-mail: co2@ophiroptics.com www.co2optics.com

CO2 Optics Catalog 2011 - 2012

GERMANY Ophir Optronics GmbH – OPG Bismarckstraße 18, 31582 Nienburg, Germany Tel. 49-5021-60769-0 Fax. 49-5021-60769-18 e-mail: info@ophiropt.de www.ophiropt.de

INTERNATIONAL HEADQUARTERS Ophir Optronics Ltd. - OOL Science - Based Industrial Park Har Hotzvim, P.O Box 45021 Jerusalem, 9145001 Israel Tel. 972-2-548-4444 Fax. 972-2-582-2338 e-mail: co2@ophiropt.com www.co2optics.com

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