Chao's Blog

Month: November 2020

Notes for Chapter 2-Theory of OCT Part 2

2.5 Fourier-Domain Low-Coherence Interferometry Still, the cross-correlation component is the desired part. The FWHM of the DC artifact is only one coherence length wide, however, the signal amplitude is much higher than another two components. How to remove it ? Record the amplitude of the spectral interferometric signal with reference reflector but no sample present, […]

Notes for Chapter 2-Theory of OCT Part 1

2.1 Introduction About the A-scan: the electronic signals detected by the photoreceiver are processed as A-scan, which represents the reflectivity profile at the specific focal spot of the sample beam. About B-scan: multiple A-scans are acquired by sweeping in the lateral direction, and thus a two-dimensional cross-sectional image is created. C-scan: en face images at […]