Co-beam scanning retinal imaging system

Abstract

The invention discloses a retinal imaging system for common beam scanning, comprising: a light source module, an adaptive optics module, a beam scanning module, a small field of view relay module, a large field of view relay module, an optotype module, a pupil monitoring module, a detection modules, control modules and output modules. The present invention uses adaptive optics technology to correct human eye aberrations in real time, and through synchronous scanning of light beams, combined with two sets of relay optical path structures of the small field of view and the large field of view, the confocal scanning imaging function within the large field of view and the small field of view can be realized at the same time. Field-wide adaptive optics high-resolution imaging capabilities. The system can not only observe large-scale disease lesions in the retina by imaging with a large field of view, but also observe the fine structure of lesions with high-resolution imaging in a small field of view. A variety of imaging images are acquired through common optical path beam scanning to meet the needs of different application scenarios. Greatly expands the application range of existing confocal imaging equipment.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a common beam scanning retinal imaging system. 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, even the eyes with no refractive error will inevitably have optical aberrations, especially in order to obtain high resolution under large numerical aperture, under the large pupil according to optical theory can get better High diffraction-limited resolution, but the large pupil brings more aberrations of the human eye, which greatly limits the actual resolution. Traditional laser confocal scanning ophthalmosc...

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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