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Back-illuminated pulse-frequency-modulated photosensor using silicon-on-sapphire technology developed for use as epi-retinal prosthesis device

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5 Author(s)
Uehara, A. ; NIDEK Co. Ltd., Gamagori, Japan ; Kagawa, K. ; Tokuda, T. ; Ohta, J.
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An intra-ocular epi-retinal prosthesis device using a back-illuminated photosensor is proposed and demonstrated for the first time. The photosensor, based on a pulse frequency modulation, is fabricated on a transparent sapphire substrate to detect the backside incident light. Experimental results show that the device is sensitive over a dynamic range of incident light of 30 dB.

Published in:
Electronics Letters  (Volume:39 ,  Issue: 15 )

Date of Publication: 24 July 2003

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