A non-mydriatic fundus camera designed with two-channel illumination

Wenchao Zhang; Jun Chang; Weilin Chen; Xuehui Zhao; Bingqing Xie

doi:10.1117/12.2643779

19 December 2022 A non-mydriatic fundus camera designed with two-channel illumination

Wenchao Zhang, Jun Chang, Weilin Chen, Xuehui Zhao, Bingqing Xie

Proceedings Volume 12320, Optics in Health Care and Biomedical Optics XII; 1232017 (2022) https://doi.org/10.1117/12.2643779
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

With the improvement of people's health awareness, portable fundus cameras for health monitoring are popular. In order to solve the problem of non-mydriasis in fundus cameras based on new smart phones, we propose a dual channel lighting non-mydriasis method. The system focus with 680nm light, and captures color images with white light flash. In this study, a group of orthogonal polarizers were used to eliminate the stray light caused by the front eyepiece, and a circular light source was used to suppress corneal reflection. The system performs well with a field of view of 45° and a pupil diameter of 3mm, when refractive error ranges from -10D to +10D. The imaging quality of the system is good in 480- 700nm band. This study provides a reliable scheme for telemedicine of senile ophthalmic diseases.

Conference Presentation

Citation Download Citation

Wenchao Zhang, Jun Chang, Weilin Chen, Xuehui Zhao, and Bingqing Xie "A non-mydriatic fundus camera designed with two-channel illumination", Proc. SPIE 12320, Optics in Health Care and Biomedical Optics XII, 1232017 (19 December 2022); https://doi.org/10.1117/12.2643779

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