Spectral domain OCT detecting system and method based on segmented spectrum optical path coding

Abstract

The invention discloses a spectral domain OCT detecting system and method based on segmented spectrum optical path coding. A dichroscope is arranged in a traditional reference arm, so that a light source spectrum is divided into two portions which arrive at a transmission light path and a reflection light path respectively. Due to the fact that the positions of plane mirrors in the transmission light path and the reflection light path are different, and the two portions of the spectrums cover different optical paths in the reference arm and interfere with returning light of two different depth sections in a sample. After the two portions of spectrum interference signals enter a detection arm, the spectrum interference signals are detected by pixel points in different regions of a CCD in a spectrometer, spectrum parallel obtaining is achieved on the non-aliasing condition. On the condition that the detection arm and a sample arm of spectrum domain OTC are not changed, a simple light splitting structure is additionally arranged in the reference arm, arrangement of different zero-optical-path positions in a sample and parallel detection of double reference arm spectrum domain OCT signals are achieved, and imaging range of the spectrum domain OCT is broadened.

Description

technical field [0001] The present invention relates to optical coherence tomography (Optical Coherence Tomography, OCT for short) technology, in particular to a spectral domain OCT detection system and method based on segmented spectral optical path coding. Background technique [0002] Optical coherence tomography (OCT) can perform non-contact, non-invasive, high-resolution in vivo imaging of internal tissue structures and physiological functions in vivo, and has a wide range of applications in the field of biomedical imaging. Especially in the field of ophthalmology, the application prospect of OCT is even greater. The common anterior segment OCT (Anterior segment OCT, AS-OCT) can provide non-contact structural images of the anterior segment in the optical path under static and dynamic conditions, and does not require Indirect observation of corresponding changes in the observed eye by stimulating the contralateral eye to induce adjustment has become an ideal tool for mea...

AI Technical Summary

Problems solved by technology

However, the switching process will bring time loss, which will limit the imaging speed of the system to a certain extent, and need to do image stitching processing in the later stage, which cannot meet the requirements of real-time imaging

Simultaneous imaging with two sets of spectrometers can also achieve the desired imaging depth, but it is not economical to build an additional set of spectrometers

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