Optical system for a fundus camera

By optimizing the lens group structure and semi-transparent mirror design of the fundus camera optical system, and integrating the deformable mirror and wavefront sensor to form a closed-loop control, the problems of insufficient imaging quality and adaptive adjustment of traditional fundus cameras are solved, and efficient fundus imaging and wavefront detection are achieved.

CN121795833BActive Publication Date: 2026-05-22CHONGQING BIO NEWVISION MEDICAL EQUIP LTD
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Patent Information

Application Number
CN202610270989.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-06
Publication Date
2026-05-22
Estimated Expiration
2046-03-06

AI Technical Summary

Technical Problem

Traditional fundus camera optical systems have shortcomings in image quality and adaptive adjustment, and cannot compensate for human eye aberrations and optical system errors in real time, resulting in limited image clarity and diagnostic accuracy.

Method used

It employs an aberration-correcting mirror group, a field mirror group, and a deformable mirror, combined with a semi-transparent and semi-reflective mirror design, to achieve closed-loop control, integrate imaging and wavefront detection paths, and dynamically compensate for aberrations and errors.

Benefits of technology

It achieves simultaneous acquisition of high-resolution fundus imaging and high-precision wavefront sensing, improving imaging quality and light energy utilization, and meeting the needs of modern ophthalmological diagnosis and treatment.

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Abstract

The application provides an optical system of a fundus camera, which comprises an ocular lens, an aperture diaphragm, an aberration-correcting lens group, a field lens group, a half-transmission half-reflection mirror and an imaging lens group, light of a light source is irradiated to a pupil through the ocular lens, the light goes out from the pupil and sequentially passes through the ocular lens, the aperture diaphragm, the aberration-correcting lens group and the field lens group to reach the half-transmission half-reflection mirror, 50% of the light transmits through the half-transmission half-reflection mirror to the imaging lens group and is imaged on a CCD, and the other 50% of the light is reflected by the half-transmission half-reflection mirror and is used for connection with a wavefront sensor, and the field lens group comprises a deformable mirror.The application realizes synchronous and efficient collection of high-resolution fundus imaging and high-precision wavefront sensing by optimizing the structure of the aberration-correcting lens group, integrating the field lens group and the deformable mirror and adopting the half-transmission half-reflection mirror light splitting design, and the imaging quality, light energy utilization rate and functional integration degree of the system are improved, and the high-performance requirement of the fundus camera in modern ophthalmic diagnosis and treatment is met.
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