Digital micro-lens components based interference-free parallel OCT imaging method and system

Abstract

This invention discloses one parallel optical coherent tomography method and system without crosstalk based on digital micro deice, which adopts wide band point source to realize shining, wherein, the light path adds one DMD and optical system design ensures the equivalent size of the level size on the sample conjugate surface and the level size of the system resolution sample; the micro lens is at 12 degrees at open status to lead the relative part into interference system; the DMD coding changes parallel status of the images to depress biological body imaging of fixed signal series; extracting interference signals by the four step integration detection method of sine phase modulation technique.

Description

technical field [0001] The invention relates to a method and system for suppressing crosstalk of parallel optical coherence tomography, in particular to a method and system for suppressing crosstalk of parallel optical coherence tomography based on a digital micromirror device. Background technique [0002] Optical coherence tomography (OCT) is a tomographic imaging technology developed in recent years, which can realize non-contact, non-invasive, high-resolution imaging of the structure and physiological functions of living tissues. It is widely used in diagnosis and will also play an important role in materials science and basic research. [0003] Compared with point-by-point imaging, parallel imaging of OCT has the following advantages: 1. It does not require fast mechanical scanning movement like point-by-point imaging, and mechanical stability can be guaranteed; 2. All pixels in an image are collected synchronously , can avoid false images caused by periodic life rhyth...

AI Technical Summary

Problems solved by technology

Too low energy limits detection sensitivity and image acquisition speed

[0006] Therefore, among the two illumination methods of the parallel OCT imaging system, the spatially coherent illumination formed by the broadband point light source can provide each detection point with higher energy, which can achieve high detection sensitivity and fast image acquisition, but the difference between each detection channel Crosstalk will occur; while spatial incoherent lighting based on thermal light sources avoids crosstalk, but the energy provided to each detection point is very low, which limits detection sensitivity and image acquisition speed

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