Optical coherence tomography system correction method

Abstract

The invention provides an optical coherence tomography (OCT) system correction method. The method comprises the steps of obtaining correction data and correcting, wherein in the step of obtaining correction data, the OCT system scans a reference slide to obtain the relation function between the reference slide measured value and different depth positions; and in the correcting step, the obtained detection data are corrected according to the relation function between the thickness and the depth positions.

Description

technical field [0001] The invention relates to an OCT system calibration method. Background technique [0002] The OCT (Optical Coherence Tomography) system uses the galvanometer in the fast scanning delay line (RSOD) to vibrate back and forth to change the optical path of the reference arm, thereby realizing the depth direction scanning of the OCT system. In theory, a signal is applied to the galvanometer to make it vibrate back and forth at a constant speed to achieve a uniform scan in the depth direction of the OCT system. However, in an actual system, since it is necessary to increase the scanning rate and imaging rate of the OCT system as much as possible, the galvanometer is usually oscillated at a high speed close to its limit. Such as figure 1 As shown, at this time, the galvanometer cannot run completely according to the driving signal, that is, non-uniform high-speed vibration, resulting in nonlinear distortion in the longitudinal direction of the final OCT imag...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, at this time, the galvanometer cannot run completely according to the driving signal, that is, non-uniform high-speed vibration, resulting in nonlinear distortion in the longitudinal direction of the final OCT image.

Images