Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1993-02-22
1994-09-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313528, H01J 4014
Patent
active
053491777
ABSTRACT:
An image intensifier tube that utilizes a photoresponsive layer for producing electrons in response to received radiation, a solid state electron amplifier for multiplying the electrons produced by the photoresponsive layer, a cold cathode for emitting electrons into vacuum, and a phosphor screen for converting impinging electrons into a visible image. The solid state electron amplifier is formed as a semiconductive layer interposed in between a photoresponse layer and a negative electron affinity layer on the photocathode. The solid state electron amplifier receives the electrons produced by the photoresponsive layer, multiplies the electrons and directs the electrons to the negative electron affinity layer. The negative electron affinity layer then directs the electrons through a vacuum to the phosphor screen producing a viewed image.
REFERENCES:
patent: 3951698 (1976-04-01), Wilson et al.
patent: 4431914 (1984-02-01), Mourou et al.
patent: 4628273 (1986-12-01), Vlasak
patent: 4974090 (1990-11-01), Kawamura et al.
patent: 4980772 (1990-12-01), Kawamura et al.
patent: 4990766 (1991-02-01), Simms et al.
Field Robert J.
Thomas Nils I.
Hogan Patrick M.
ITT Corporation
Nelms David C.
Plevy Arthur L.
Shami K.
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