Optical: systems and elements – Holographic system or element – Having optical element between object and recording medium
Patent
1990-07-02
1991-08-13
Hellner, Mark
Optical: systems and elements
Holographic system or element
Having optical element between object and recording medium
359246, 235454, G06K 710
Patent
active
050392107
ABSTRACT:
An optical information system which uses a liquid crystal television (LCTV) as a one dimensional spatial light modulator (SLM) is presented. An optical carrier wave is generated by polarizing and collimating the output of a laser. The liquid crystal television modulates the optical carrier wave with a digital modulating signal to output thereby a modulated optical signal: An array of photodetectors electroptically connects the modulated optical signal into a modulated electrical signal which is displayed on an oscilloscope. The use of an LCTV as a one dimensional SLM yields higher numerical accuracy and extended dynamic range than two dimensional SLM applications of the same equipment.
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patent: 4715683 (1987-12-01), Gregory et al.
patent: 4813761 (1989-03-01), Davis et al.
patent: 4815799 (1989-03-01), Goldstein et al.
patent: 4867543 (1989-09-01), Bennion et al.
patent: 4916296 (1990-04-01), Streck
Welstead, Stephen T. et al., "Adaptive Signal Processing Using a Liquid Crystal Television", Published in SPIE Proceedings, vol. 1154, Real Time Signal Processing XII, Aug. 1989.
Ward Michael J.
Welstead Stephen T.
Auton William G.
Hellner Mark
Singer Donald J.
The United States of America as represented by the Secretary of
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