Non-Mydriatic Confocal Retinal Imaging Using a Digital Light Projector.
A digital light projector is implemented as an integrated illumination source and scanning element in a confocal non-mydriatic 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.
Aeon Imaging, LLC, 501 S Madison St., Ste. 103, Bloomington, IN, USA 47403-2452.
Matthew S
MS
Muller
Ann E
AE
Elsner
Glen Y
GY
Ozawa
CMOS; DLP; DLP-Cam; LightCrafter; biomedical imaging; confocal imaging; digital imaging; rolling shutter; spatial light modulator