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
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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
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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
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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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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
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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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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
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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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