AO-oct imaging system and method based on coherence gate virtual Shack-Hartmann wavefront detection technology

Abstract

The invention discloses an AO-OCT imaging system and method based on coherence gate virtual Shaker-Hartmann wavefront detection technology, including a beacon light source, an imaging light source, first and second collimating mirrors, first and second Dichroic mirrors, beam splitters, wavefront correctors, actuators, electric translation stages, wavefront detection cameras, imaging cameras, computers, wavefront controllers, signal generation cards, first and second image acquisition cards, etc. . The coherent gate virtual Shaker-Hartmann wavefront detection technology is used to detect the aberration of a specific layer in the sample, and the AO technology is used to correct the aberration, and then the full-field time-domain OCT technology is used to perform high-resolution OCT imaging of the layer. The invention can be positioned at any layer in the sample, and realizes high-resolution imaging of the layer by detecting and correcting the wavefront aberration of the layer. The system of the invention is simple in structure and adjustment, can flexibly adjust the order of detection aberration, reduce non-common path aberration, reduce system size and cost, and the like.

Description

technical field [0001] The present invention relates to adaptive optics (AO) technology and optical coherence tomography (OCT) technology, relate in particular to a kind of adaptive optics optical coherence tomography ( AO-OCT) systems and methods. Background technique [0002] Optical coherence tomography (OCT) technology is a technology that uses the principle of low coherence interference to perform high-resolution tomography inside the sample. The outstanding feature of OCT technology is that the lateral resolution δx and longitudinal resolution δz are independent of each other, which are determined by the focusing conditions and the bandwidth of the light source, so it is possible to obtain high δx and high δz at the same time. Therefore, OCT technology has developed rapidly and has been widely used in biological tissue imaging, especially in the fields of ophthalmology and cardiovascular. [0003] When the light beam propagates in the medium, due to the uneven distri...

AI Technical Summary

Problems solved by technology

However, the CG-SHWS technology using MLA still has problems, mainly including: the optical path structure, installation and debugging are relatively complicated; the number of MLA arrays is related to the order of the aberrations that can be detected. Complete, it is difficult to flexibly change the order of aberration detection according to actual needs

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