3 waves. OCT imaging is sensitive to distinctions in refraction indices of optical scattering between disparate tissues.
Principles of Operation OCT produces high-resolution cross-sectional images by measuring the delay of echo time and magnitude of backscattered light. The fundamental principle of operation underlying OCT is light interference (Popescu et al., 2011). Every OCT system has at its core a light interference configuration. Several types of interference setups have been used, albeit the optical fiber-based Michelson setup will constitute the focus of this review. An OCT system has a lowcoherence light source and a coupler that splits the light into two paths and motions it along an interferometer's disparate arms (a reference and sample arm).
