Image sensing and processing by a bacteriorhodopsin-based artificial photoreceptor
Tsutomu Miyasaka and Koichi Koyama »View Author Affiliations

Applied Optics, Vol. 32, Issue 31, pp. 6371-6379 (1993)
http://dx.doi.org/10.1364/AO.32.006371

View Full Text Article
Acrobat PDF (1431 KB)

Journal SearchArticle Lookup


Search by title, abstract, or author


Advanced Search
Browse Journals / Lookup Meetings
Article Tools
Share
Email this Article Share with Facebook Tweet This Add to CiteULike Mendeley Add to BibSonomy delicious
Citations
Alert me when this article is cited
Export Citation/Save Click for help

AbstractArticle InfoReferences (12)Cited ByMetrics
Abstract
Sensing and processing of optical information have been conducted with a unique bioelectronic image sensor that immobilizes bacteriorhodopsin (bR) as a photosensitive retinal protein. A thin film of bR-containing purple membranes was coated on a two-dimensional pixel array of electrodes and was made into a junction with an electrolyte gel layer having a counterelectrode to form an artificial photoreceptor. Photocurrent signals from each pixel showed a differential responsivity to light intensity, intrinsic to this liquid-junction photocell. Images detected and processed by the bR-based artificial photoreceptor were simultaneously displayed on a light-emitting-diode monitor panel through parallel signal-transmission circuitry. The experiment revealed that the photoreceptor is, as a retina model, capable of selectively detecting motion of images in real time and of performing vectorial extraction of their edge components, similar to the visual processing function of biological photoreceptors.

© 1993 Optical Society of America