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Optical Engineering

High-speed and high-contrast incoherent-to-coherent converter that uses a GaAs single crystal
Author(s): Youichi Bitou; Yukihisa Osugi; Takumi Minemoto
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Paper Abstract

A new optically addressed spatial light modulator using a GaAs single crystal plate is developed for incoherent-to-coherent optical image converter. The device has the same structure as the Pockels readout optical modulator. The basic characteristics of the device are measured as half-wave voltage, 10.5 kV; sensitivity, 0.65 ?J/cm2 at visible light; and resolution, 5.6 line pairs/mm. The high-frame-rate (over 500 Hz) operation and high contrast ratio (over 700:1) are experimentally confirmed. The Fourier transforms of alphabetic characters are successfully performed and an application to joint transform correlator is demonstrated.

Paper Details

Date Published: 1 April 1999
PDF: 7 pages
Opt. Eng. 38(4) doi: 10.1117/1.602114
Published in: Optical Engineering Volume 38, Issue 4
Show Author Affiliations
Youichi Bitou, National Research Lab of Metrology (Japan)
Yukihisa Osugi, NGK Insulators, Ltd. (Japan)
Takumi Minemoto, Kobe Univ. (Japan)

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