Optical design of portable nonmydriatic fundus camera

Weilin Chen; Jun Chang; Fengxian Lv; Yifan He; Xin Liu; Dajiang Wang

doi:10.1117/12.2268699

8 March 2017 Optical design of portable nonmydriatic fundus camera

Weilin Chen, Jun Chang, Fengxian Lv, Yifan He, Xin Liu, Dajiang Wang

Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 102551J (2017) https://doi.org/10.1117/12.2268699
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China

Abstract

Fundus camera is widely used in screening and diagnosis of retinal disease. It is a simple, and widely used medical equipment. Early fundus camera expands the pupil with mydriatic to increase the amount of the incoming light, which makes the patients feel vertigo and blurred. Nonmydriatic fundus camera is a trend of fundus camera. Desktop fundus camera is not easy to carry, and only suitable to be used in the hospital. However, portable nonmydriatic retinal camera is convenient for patient self-examination or medical stuff visiting a patient at home. This paper presents a portable nonmydriatic fundus camera with the field of view (FOV) of 40°, Two kinds of light source are used, 590nm is used in imaging, while 808nm light is used in observing the fundus in high resolving power. Ring lights and a hollow mirror are employed to restrain the stray light from the cornea center. The focus of the camera is adjusted by reposition the CCD along the optical axis. The range of the diopter is between -20m^-1 and 20m^-1.

Citation Download Citation

Weilin Chen, Jun Chang, Fengxian Lv, Yifan He, Xin Liu, and Dajiang Wang "Optical design of portable nonmydriatic fundus camera", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102551J (8 March 2017); https://doi.org/10.1117/12.2268699

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