High-speed binary optically addressed spatial light modulator

We describe the structure and operating characteristics of a high-speed optically addressed spatial light modulator (OASLM) with a hydrogenated amorphous silicon (a-Si:H) photosensor and a ferroelectric liquid-crystal modulator. The photosensor is a p-i-n photodiode, which switches the liquid crysta...

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Veröffentlicht in:	Applied physics letters 1989-08, Vol.55 (6), p.537-539
Hauptverfasser:	MODDEL, G, JOHNSON, K. M, LI, W, RICE, R. A, PAGANO-STAUFFER, L. A, HANDSCHY, M. A
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Fundamental areas of phenomenology (including applications) Optical elements, devices, and systems Optical processors, correlators, and modulators Optics Physics
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Beschreibung
Zusammenfassung:	We describe the structure and operating characteristics of a high-speed optically addressed spatial light modulator (OASLM) with a hydrogenated amorphous silicon (a-Si:H) photosensor and a ferroelectric liquid-crystal modulator. The photosensor is a p-i-n photodiode, which switches the liquid crystal into one of two stable states. Under a write-light intensity of 6 mW/cm2, the OASLM exhibits a response time of 155 μs, a contrast ratio of 20:1, and a resolution of 40 lp/mm. The writing sensitivity per pixel is 0.1 pJ.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.101847