SWEPT SOURCE OPTICAL COHERENCE TOMOGRAPHY IMAGING SYSTEM

摘要

A swept-source OCT imaging system for imaging a region (90) of an object (70), comprising: a swept light source (10) which generates a beam (80) of varying wavelength; a scanning element (40) which scans the beam across the object; an interferometer (410) which generates interference light by combining light scattered by the object (owing to the scan) with reference light; a photodetector (50) which generates an electrical signal (S) having frequency components spanning a frequency band and caused by interference of the scattered light with the reference light; a band-pass filter module (420) which band-pass filters the electrical signal; and a sample acquisition module (440) which samples the filtered electrical signal. The band-pass filter module extracts at least some of the frequency components spanning the frequency band from the electrical signal. The sample acquisition module band-pass samples the filtered electrical signal.