Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-01-26
1996-03-19
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 59, G02F 11343
Patent
active
055007481
ABSTRACT:
There is disclosed herein a liquid crystal spatial light modulator which includes, among other components, a layer of liquid crystal material which changes the way in which it acts on light in response to predetermined changes in voltage across the layer, whereby to modulate the light so acted upon, and an arrangement for applying a light modulating voltage across the layer of liquid crystal material and for modulating the voltage during a given modulation period. This latter arrangement includes a non-linear capacitor and a voltage coupling scheme for changing the voltage across the capacitor during the modulation period in a way which changes the capacitance of the capacitor and thereby capacitively couples at least a part of the change in voltage across the capacitor to the layer of liquid crystal material.
REFERENCES:
patent: 4233603 (1980-11-01), Castleberry
patent: 4758831 (1988-07-01), Kasahara
patent: 4792210 (1988-12-01), Maurice
IBM Technical Disclosure Bulletin (TDB) vol. 22 #6 Nov. '79 pp. 2507-2508.
IBM TDB vol. 33 #1A Jun. '90 pp. 481-482.
Gaalema Stephen D.
Handschy Mark A.
Displaytech, Inc.
Nguyen Teep H.
Shear Stephen C.
Sikes William L.
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