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Proceedings Paper

A single pixel camera video ophthalmoscope
Author(s): B. Lochocki; A. Gambin; S. Manzanera; E. Irles; E. Tajahuerce; J. Lancis; P. Artal
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Paper Abstract

There are several ophthalmic devices to image the retina, from fundus cameras capable to image the whole fundus to scanning ophthalmoscopes with photoreceptor resolution. Unfortunately, these devices are prone to a variety of ocular conditions like defocus and media opacities, which usually degrade the quality of the image. Here, we demonstrate a novel approach to image the retina in real-time using a single pixel camera, which has the potential to circumvent those optical restrictions. The imaging procedure is as follows: a set of spatially coded patterns is projected rapidly onto the retina using a digital micro mirror device. At the same time, the inner product’s intensity is measured for each pattern with a photomultiplier module. Subsequently, an image of the retina is reconstructed computationally. Obtained image resolution is up to 128 x 128 px with a varying real-time video framerate up to 11 fps. Experimental results obtained in an artificial eye confirm the tolerance against defocus compared to a conventional multi-pixel array based system. Furthermore, the use of a multiplexed illumination offers a SNR improvement leading to a lower illumination of the eye and hence an increase in patient’s comfort. In addition, the proposed system could enable imaging in wavelength ranges where cameras are not available.

Paper Details

Date Published: 15 February 2017
PDF: 7 pages
Proc. SPIE 10057, Multimodal Biomedical Imaging XII, 100570M (15 February 2017); doi: 10.1117/12.2251968
Show Author Affiliations
B. Lochocki, Univ. de Murcia (Spain)
A. Gambin, Univ. de Murcia (Spain)
S. Manzanera, Univ. de Murcia (Spain)
E. Irles, Univ. Jaume I (Spain)
E. Tajahuerce, Univ. Jaume I (Spain)
J. Lancis, Univ. Jaume I (Spain)
P. Artal, Univ. de Murcia (Spain)

Published in SPIE Proceedings Vol. 10057:
Multimodal Biomedical Imaging XII
Fred S. Azar; Xavier Intes, Editor(s)

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