激光技术2024，Vol.48Issue(4)：484-490,7.DOI:10.7510/jgjs.issn.1001-3806.2024.04.005
用于眼底成像的双光楔裂像电控调焦系统
An electronically controlled focusing system using dual light wedge split image for fundus imaging
摘要
Abstract
In order to achieve precise focusing during fundus imaging,an electronically controlled focusing system using dual light wedge split image was designed.A 905 nm near-infrared semiconductor laser was used to form a rectangular sight mark on the retina through a dual light wedge and a rectangular slit.The movement of the sight compensation mirror and the dual light wedge mechanism was realized by motor control,and the displacement correlation between the sight compensation mirror and the dual light wedge was obtained.According to the separation of the rectangular sight mark,the defocus compensation state was real-time feedback,and the control system was guided to move the dual light wedge and the sight compensation mirror to achieve accurate focusing during fundus imaging.The focusing experiment of fundus imaging was conducted on the simulated eye,and the result showed that system can achieve-10 m-1～10 m-1 refractive compensation,and the focusing accuracy was more than 1 m-1.The electronically controlled focusing system using dual light wedge split image has fast focusing speed and high precision,which provides a basis for the development of automatic fundus imaging instruments.关键词
激光技术/离焦补偿/闭环控制/视标Key words
laser technique/defocus compensation/closed-loop control/visual target分类
信息技术与安全科学引用本文复制引用
盖俊帅,马玉婷,张运海,杨皓旻,刘玉龙..用于眼底成像的双光楔裂像电控调焦系统[J].激光技术,2024,48(4):484-490,7.基金项目
山东省自然科学基金资助项目(ZR2020QF103) （ZR2020QF103）
苏州市临床重点病种诊疗技术专项基金资助项目(LCZX202105) （LCZX202105）
核医科技创新计划资助项目(ZHYLZD2021001) （ZHYLZD2021001）
中国宝原科研基金资助项目(270001) （270001）
中国科学院青年创新促进会项目(2020323) （2020323）
