Diagnostics/Optical Coherence Tomography: Light source calibration for accurate depth readings from FD-OCT
Producing accurate depth information with Fourier-domain optical coherence tomography (FD-OCT) depends on proper light source calibration; there are different considerations for nonlinear sampling in the two primary FD-OCT implementations: spectral-domain (SD-OCT) and swept-source (SS-OCT). Fourier-domain optical coherence tomography (FD-OCT) is a coherence gating technique. It acquires, as a function of optical wavenumber, the interferometric signal generated by mixing backscattered light from the sample with reference light at a fixed group delay. Back-reflection or backscattered light from samples at different delays generates oscillations or fringes in the interference spectrum. Increased delay produces higher oscillation frequency in the interference spectrum. It is ...
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