SS-OCT Measurement - Analysis Method and Actual Measurement Examples
Overview:
OCT (Optical Coherence Tomography) is a well-known non-contact technology for inspecting internal structures using light. OCT visualizes internal structures by irradiating the object with light and calculating the relative distance using the interference signal generated by the reflected light from the internal refractive index boundary surface and the reference light. It is widely used for inspection of biological tissues, mainly for ophthalmology.
This white paper explains measurement principle and some kinds of examples for SS-OCT.
Index
1 Introduction 3
2 SS-OCT Measurement Procedure 5
2.1 Measurement Principle 5
2.2 Examples of Interferometer Configurations 11
2.3 Linearize Processing and Sampling 12
2.3.1 Hardware Linearize Processing 15
2.3.2 Software Linearize Processing 18
2.4 Delay Compensation 20
2.5 Wavelength Dispersion Compensation 21
2.6 Optical Path Length Difference Measurement of Reference Interferometer 25
2.7 Distance Calculation 26
2.8 Wavelength Sweep Width and Resolution 27
2.9 Temporal variation in distance measurement 28
3 Measurement Examples 29
3.1 SS-OCT Measurement 30
4 Summary 33
5 Reference 33