Common-beam scanning retina imaging system

Abstract

The invention discloses a common-beam scanning retina imaging system which comprises a light source module, a self-adaptive optical module, a beam scanning module, a small-view-field relay module, a large-view-field relay module, a sighting mark module, a pupil monitoring module, a detection module, a control module and an output module. According to the system, human eye aberration is corrected in real time by using an adaptive optical technology, and a confocal scanning imaging function in a large view field range and an adaptive optical high-resolution imaging function in a small view fieldrange can be simultaneously realized through light beam synchronous scanning setting in combination with two sets of relay light path structures of the small view field and the large view field. According to the system, a large-range disease focus area of a retina can be observed through large-view-field imaging, a fine structure of a focus can be observed through small-view-field high-resolutionimaging, various imaging images are obtained through common-light-path light beam scanning, different application scene requirements are met, and the application range of existing confocal imaging equipment is greatly expanded.

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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