Ultra-wide field fundus imaging system

Abstract

The invention discloses an ultra-wide field fundus imaging system which comprises a light source, an optical splitter, a scanning assembly, a curved reflector, a detection pinhole and an imaging assembly, wherein the scanning assembly comprises a first scanning mirror and a second scanning mirror, the first scanning mirror scans in the first direction, and the second scanning mirror scans in the second direction; light emitted by the light source is reflected by the first scanning mirror, the curved reflector, the second scanning mirror and the curved reflector respectively after passing by the optical splitter and then enters the fundus; the light entering the fundus returns to the optical splitter along the same route after being reflected by the retina, penetrates through the detection pinhole and enters the imaging assembly. Compared with the prior art, the ultra-wide field fundus imaging system realizes fundus imaging by total reflection, and ghost images brought by imaging of a lens module are effectively avoided. Because the curvature of the curved reflector changes gradually, the light reflected by the curved reflector can enter the fundus at larger angle of incidence, and large view field imaging is realized.

Description

technical field [0001] The invention relates to a fundus imaging system, in particular to a total reflection confocal scanning fundus imaging system. Background technique [0002] The fundus camera belongs to the field of medical imaging and is used to obtain retinal images of the human eye so that medical personnel can check fundus diseases or assist medical personnel to judge the condition of other organs. Because the blood vessels of the fundus are the only blood vessels that can be directly observed through the body surface, medical personnel can check whether there are lesions in the optic nerve, retina, choroid and refractive medium of the fundus through the fundus camera, and can also use the fundus camera to assist other systems. Diagnosis and judgment of diseases, such as detecting cerebral infarction, cerebral hemorrhage, cerebral arteriosclerosis, brain tumors, diabetes, kidney disease, hypertension, retinopathy of prematurity, glaucoma, age-related macular degene...

AI Technical Summary

Problems solved by technology

However, the lens module will reflect the illumination light, thus forming ghost images and affecting the image quality

In addition, the imaging field of view of the lens module imaging system is small, which cannot meet the needs of medical personnel for large field of view imaging

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