Comparison of operation parameters between binary and analogue switching pixellated light valves

Author

Yim, L.W.K. ; Davey, A.B. ; Crossland, W.A.

Author_Institution

Dept. of Eng., Cambridge Univ., UK

Volume

145

Issue

4

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

236

Lastpage

242

Abstract

The paper describes operation parameters of light valves (or optically addressed spatial light modulators (OASLMs)) which incorporate the pixellated binary (SCE 13) and a pixellated analogue (Chisso 2004) switching liquid crystal effect devices. The four operation parameters, namely the spatial resolution at 50% modulation, switching speed (or frame rate), sensitivity, and contrast ratio for the SCE 13 device were 54 lines/mm, 3.5 kHz, 2.3 mW/cm² and 17:1, respectively. Those of its Chisso 2004 counterpart were 52 lines/mm, 2.5 kHz, 2.5 mW/cm² and 10.8:1. Modulated output images acquired by writing the United States Air Force (USAF) resolution chart and a slide on the photosensitive layer of the light valve are shown

Keywords

electro-optical switches; image resolution; liquid crystal devices; spatial filters; spatial light modulators; 2.5 kHz; 3.5 kHz; Chisso 2004; USAF resolution chart; analogue switching pixellated light valves; binary switching pixellated light valves; contrast ratio; frame rate; light valve; modulated output images; operation parameters; optically addressed spatial light modulators; photosensitive layer; pixellated analogue (Chisso 2004) switching liquid crystal effect devices; pixellated binary (SCE 13) liquid crystal effect devices; sensitivity; slide; spatial resolution; switching speed;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19982145

Filename

714599