Confocal Retinal Imaging Using a Digital Light Projector with a Near Infrared VCSEL Source

Matthew S Muller; Ann E Elsner

doi:10.1117/12.2290286

Confocal Retinal Imaging Using a Digital Light Projector with a Near Infrared VCSEL Source

Proc SPIE Int Soc Opt Eng. 2018 Feb:10546:105460G. doi: 10.1117/12.2290286.

Authors

Matthew S Muller¹, Ann E Elsner^{1

2}

Affiliations

¹ Aeon Imaging, LLC, 501 S Madison St., Ste. 103, Bloomington, IN, USA 47403-2452.
² School of Optometry, Indiana University, 800 Atwater Ave., Bloomington, IN USA 47405-3635.

Abstract

A custom near infrared VCSEL source has been implemented in a confocal non-mydriatic retinal camera, the Digital Light Ophthalmoscope (DLO). The use of near infrared light improves patient comfort, avoids pupil constriction, penetrates the deeper retina, and does not mask visual stimuli. The DLO performs confocal imaging by synchronizing a sequence of lines displayed with a digital micromirror device to the rolling shutter exposure of a 2D CMOS camera. Real-time software adjustments enable multiply scattered light imaging, which rapidly and cost-effectively emphasizes drusen and other scattering disruptions in the deeper retina. A separate 5.1″ LCD display provides customizable visible stimuli for vision experiments with simultaneous near infrared imaging.

Keywords: Aeon Imaging; CMOS; DLP; VCSEL; confocal; multiply scattered light; retina; rolling shutter.

Abstract

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