Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1965-01-26
1985-01-29
Buczinski, S. C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250203CT, 250213R, 250342, 313461, H01J 4014, G01J 100, H01J 4000
Patent
active
044968337
ABSTRACT:
1. Apparatus for locating a target which radiates or reflects electromagnetic energy comprising a circular-scan cathode-ray tube including a screen and an electron beam moving over said screen, regions of said screen fluorescing when impinged upon by said electron beam to generate light energy, a plurality of semi-conductor elements disposed on said screen, each of said semi-conductor elements includng a layer of photoconductive material adjacent said screen and a layer of photo-dielectric material on said layer of photoconductive material and adapted to receive electromagnetic energy from said target, said photoconductive material having a low resistance only when receiving light energy, said photo-dielectric material changing electrical capacitance when receiving electromagnetic energy, means for conductively connecting together said layers of photoconductive material to provide a first terminal, an electromagnetic radiation permeable conductor disposed on all other said layers of photo-dielectric material and including a second terminal, and an oscillator means including a tuned circuit connected to said first and second terminals, said oscillator means transmitting a target indicating signal when the layer of photo-dielectric material of one of said semi-conductor elements receives electromagnetic energy simultaneously with the receipt of light energy by its associated layer of photoconductive material.
REFERENCES:
patent: 2234328 (1941-03-01), Wolff
patent: 2732469 (1956-01-01), Palmer
patent: 3069551 (1962-12-01), Haine
Tomaschek, "Illumination and Structure of Solid Materials", 1943, Committee Press R. Oldenbourg (Germany).
Buczinski S. C.
Meller Michael N.
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