Large-field-of-view adaptive optics retinal imaging system and method with common-path optical beam scanning

Abstract

The invention discloses a large-field-of-view adaptive optics retinal imaging system and method with common-path optical beam scanning. The system comprises a light source module, an adaptive optics module, an optical beam scanning module, a defocus compensation module, a sighting mark module, a pupil monitoring module, a detection module, a control module and an output module. The system and themethod provided by the invention can acquire fundus retinal large-field-of-view imaging images, small-field-of-view high-resolution imaging images of any region of interest and large-field-of-view high-resolution imaging images, and the three types of imaging images are acquired by a common-path structure, so that the three types of imaging images are good in feature consistency and convenient toprocess and operate. Meanwhile, the system is simple in structure, and three types of retinal imaging images can be obtained through the common-path structure. The imaging images are obtained throughcommon-path optical beam scanning, different application scene requirements are met, and the application range of retinal imaging is greatly widened.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a large field of view adaptive optical retinal imaging system and method for common optical path beam scanning. Background technique [0002] The traditional confocal scanning technology developed into a mature laser confocal scanning imaging device in 1987 (Webb R, Hughes G, Delori F. Confocal scanning laser ophthalmoscope. Applied optics. 1987; 26(8): 1492-9), And it is widely used in retinal imaging, which can realize in vivo fundus retinal imaging with a large field of view. However, the eyeball is a complex optical system, and optical aberrations are unavoidable even in eyes without ametropia, especially in order to obtain high-resolution images under large numerical apertures. According to optical theory, diffraction can be obtained under large pupils. The ultimate higher resolution, but the large pupil brings more aberrations of the human eye, which greatly limits...

AI Technical Summary

Problems solved by technology

However, the device can only achieve high-resolution imaging with a maximum 3-degree field of view of the human eye

Limited by the halo area of ​​adaptive optics aberration correction, adaptive optics often compromises on the imaging field of view while achieving high-resolution imaging, and can only achieve small field of view imaging within 3°

[0004] In summary, the existing laser confocal scanning ophthalmoscope imaging field of view is large, but the resolution is not enough to observe the fine structure of the retina; the laser confocal scanning ophthalmoscope combined with adaptive optics can observe the fine structure of the retina, but the imaging visual field The field of view is small, and it is impossible to observe the lesions in a larger field of view

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