中国光学（中英文）2026，Vol.19Issue(2)：299-307,9.DOI:10.37188/CO.2025-0137
高对比度便携式眼底相机
High-contrast portable fundus camera
摘要
Abstract
To address the inherent limitations of conventional portable non-mydriatic fundus cameras,includ-ing the mutual constraints between illumination and imaging optical paths,severe interference from corneal stray light,and the difficulty of achieving simultaneous clear imaging of different retinal regions,this paper proposes a novel design system of fundus optical system.The proposed system adopts a four-point rectangu-lar illumination layout combined with regionally adjustable illumination intensity.At a pupil diameter of 3.2 mm,the corneal stray light is reduced by 91.56％compared with traditional approaches,enabling high-contrast synchronous imaging of both the optic disc and macular regions.Furthermore,a separated illumina-tion and imaging optical path architecture is employed.By integrating a wire-grid polarizer with a stacked li-quid-crystal polarization scheme,stray light caused by optical surface reflections is effectively suppressed.Within a compact system envelope of 230.4 mm×90 mm,the proposed fundus camera simultaneously achieves a wide field of view of 53°,a refractive error compensation range of±20 D,and a retinal spatial res-olution of 6 μm.The proposed system enables the acquisition of high-contrast retinal images with clearly re-solved details of both the optic disc and macula in a single-shot capture,demonstrating its suitability for port-able non-mydriatic fundus imaging applications.关键词
便携式眼底相机/免散瞳成像/光学设计/四点光源/偏振消光Key words
portable fundus camera/non-mydriatic imaging/optical system design/four-point light source/polarization-based stray light suppression分类
机械制造引用本文复制引用
陈隆,林哲凯,郑庚泳,何梓熙,曾亚光,王雪花,韩定安..高对比度便携式眼底相机[J].中国光学（中英文）,2026,19(2):299-307,9.基金项目
国家自然科学基金(No.62205060,No.62075042) （No.62205060,No.62075042）
粤港澳智能微纳光电技术联合实验室(No.2020B 1212030010)资助项目Supported by the National Natural Science Foundation of China(No.62205060,No.62075042) （No.2020B 1212030010）
The Joint Laboratory of Guangdong,Hong Kong and Macao for Intelligent Micro-and Nano-Photonic Technology(No.2020B1212030010) （No.2020B1212030010）
