Large-field-of-view ocular fundus high-resolution imaging system

Abstract

The invention discloses a large-field-of-view ocular fundus high-resolution imaging system. The system comprises a retinal objective lens group, a focusing lens, a reflecting mirror, an imaging lens group and an imaging surface; emergent light of the human eyes sequentially passes through the retinal objective lens group, the focusing lens, the reflecting mirror and the imaging lens group, emergent light of the imaging lens group forms an image on the imaging surface, and the reflecting mirror is annular and hollow. The system has a simple structure, high-quality imaging is achieved, the reflecting mirror and the pupils of the human eyes are conjugated, only imaging light is allowed to pass through, reflected light of the retinal objective lens group is prevented from entering an imaging optical path, and stray light is effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of fundus medical imaging, and more particularly to a fundus high-resolution imaging system with a large field of view. Background technique [0002] The fundus camera is a medical instrument that illuminates the fundus through an illumination system, and then images the fundus on the photosensitive chip of a CCD or CMOS camera through an imaging system, thereby obtaining a fundus image. The fundus camera is used to check whether the fundus is abnormal, such as retina, optic disc, blood vessel distribution, etc. It is of great significance for the diagnosis and prevention of ophthalmic diseases and blood vessel-related diseases. Large-scale fundus camera equipment is expensive and has poor portability, which requires professional medical staff to operate. In order to popularize fundus examination, a small, low-cost, and easy-to-operate hand-held fundus camera is required. [0003] Patent CN108309228A realiz...

AI Technical Summary

Problems solved by technology

The fundus camera imaging system is composed of an eye lens and an imaging objective lens. Its optical path is relatively simple, but it only has a 30° fundus detection field of view, and less fundus information can be obtained. It is difficult for doctors to accurately judge the condition

[0004] Patent CN104224109A realizes a fundus camera combined with an OCT system, which can be used to obtain good OCT tomographic images of the human eye fundus with different refractions, but its system is quite complicated and has poor portability, so it is not suitable for the popularization of fundus examination

[0005] The fundus camera optical system in the prior art has a small detection full field of view angle, less fundus information that can be obtained, complex structure, poor portability, and is not suitable for the popularization of fundus examination. low rate

Images