Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1973-11-08
1976-03-16
Stolwein, Walter
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250229, 250227, 350160LC, 178 782, 178DIG29, H01J 3150
Patent
active
039448177
ABSTRACT:
An optical intensity adjustment device for adjusting the intensity of optical radiation incident thereon includes a first transparent conducting electrode, a second transparent conducting electrode, a layer of a twisted nematic liquid crystal material contained between the first electrode and the second electrode, an optical polarisation polariser located adjacent to the first electrode for linearly polarising optical radiation incident on the said layer, via the first electrode, an optical polarisation analyser located adjacent to the second electrode for analysing the plane of polarisation of optical radiation emergent from the said layer, means for applying a voltage between the first electrode and the second electrode and, electrically connected to said means for applying a voltage, photoelectric means for sampling the intensity of optical radiation incident on the device and for allowing the voltage applied between the first electrode and the second electrode to be adjusted in response to a change in the intensity of optical radiation sampled by the photoelectric means. The device may be incorporated within and as part of an optical image intensifier or a television camera.
REFERENCES:
patent: 3019344 (1962-01-01), Seidman et al.
patent: 3121796 (1964-02-01), Reed
patent: 3576393 (1971-04-01), Thompson
patent: 3586773 (1971-06-01), Niemyer, Jr. et al.
patent: 3631252 (1971-12-01), Gebel
patent: 3691302 (1972-09-01), Gaeble et al.
patent: 3694659 (1972-09-01), Ramsay et al.
patent: 3731986 (1973-05-01), Fergason
patent: 3792284 (1974-02-01), Kaelin
Schadt et al., Applied Physics Letters; Vol. 18; No. 4; 2/15/71; pp. 127, 128.
Aviram et al., IBM Technical Disclosure Bulletin; Vol. 14, No. 11, Apr. 1972; pp. 3536, 3537.
Friedman: IBM Technical Disclosure Bulletin; Vol. 8; No. 1, June 1965; p. 120.
Hilsum Cyril
Johnson Frederick Alistair
Raynes Edward Peter
National Research Development Corporation
Stolwein Walter
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