Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1995-09-01
1997-08-26
Anderson, Bruce
Optical: systems and elements
Optical modulator
Light wave temporal modulation
G02B 2600
Patent
active
056615930
ABSTRACT:
A plurality of reflective conductors (28) are affixed to an insulating substrate (12). Each reflective conductor (28) overlaps and is separated from a first electrode (18) affixed to the substrate (12) thereby forming a plurality of capacitive pixel elements (32). Each capacitive pixel element (32) is electrically connected to a respective thin film transistor (40) to assist in controlling the potential difference applied to the pixel element (32). Varying each potential difference varies separation between the reflective conductor (28) and first electrode (18) thereby phase modulating a wavefront incident thereon. Thin film transistors (40) are formed on the substrate (12).
REFERENCES:
patent: 3798620 (1974-03-01), Cosentino
patent: 3840695 (1974-10-01), Fischer
patent: 4317611 (1982-03-01), Peterson
patent: 4596992 (1986-06-01), Hornbeck
Engle, Craig D. Enhanced Membrane Light Modulator, U.S. application No. 07/958,642, filed Oct. 7, 1992.
Paul K, Weimer, chapter 9, Thin Film Transistors, "Field Effect Transistors, Physics, Technology and Applications", Wallmark and Johnson, Prentice-Hall.
Engle, Craig D. Electrostatic Light Valve System Configuration, U.S. application No. 08/515,808, filing date Aug. 16, 1995.
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