Non-mydriatic confocal retinal imaging using a digital light projector

Matthew S. Muller; Ann E. Elsner; Glen Y. Ozawa

doi:10.1117/12.2001305

26 March 2013 Non-mydriatic confocal retinal imaging using a digital light projector

Matthew S. Muller, Ann E. Elsner, Glen Y. Ozawa

Proceedings Volume 8567, Ophthalmic Technologies XXIII; 85670Y (2013) https://doi.org/10.1117/12.2001305
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

A digital light projector is implemented as an integrated illumination source and scanning element in a confocal nonmydriatic retinal camera, the DLP-Cam. To simulate scanning, a series of illumination lines are rapidly projected on the retina. The backscattered light is imaged onto a 2-dimensional rolling shutter CMOS sensor. By temporally and spatially overlapping the illumination lines with the rolling shutter, confocal imaging is achieved. This approach enables a low cost, flexible, and robust design with a small footprint. Qualitative image comparison with commercial non-mydriatic SLOs and fundus cameras shows comparable fine vessel visibility and contrast.

Citation Download Citation

Matthew S. Muller, Ann E. Elsner, and Glen Y. Ozawa "Non-mydriatic confocal retinal imaging using a digital light projector", Proc. SPIE 8567, Ophthalmic Technologies XXIII, 85670Y (26 March 2013); https://doi.org/10.1117/12.2001305

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