Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1985-11-12
1987-08-18
LaRoche, Eugene R.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250332, 313544, H01J 3108, H01J 4006, H01J 4016, H01L 2500
Patent
active
046879226
ABSTRACT:
The invention relates to an image detector for a camera operating in a "day" mode and a "night" mode. The detector comprises an evacuated envelope containing a semitransparent photocathode for the transmission of incident photons or for converting photons into photoelectrons, depending on whether the mode is "day" or "night", respectively. The detector also comprises a detector capable of converting the incident photons or the photoelectrons into an electrical image signal. The image detector further includes electronic means for focussing the photoelectrons onto the detector, and optical means for focussing the photons onto the photocathode or onto the detector. The photocathode comprises a thin layer having at least one active layer of a III-V n-type material. The detector consists of a two-dimensional charge transfer device. The electronic means for focussing the photoelectrons on the charge transfer device comprises proximity focussing means.
REFERENCES:
patent: 3735139 (1973-05-01), Kalitinsky et al.
patent: 4178528 (1979-12-01), Kennedy
patent: 4178529 (1979-12-01), Kennedy
Lemonier Michel G.
Petit Maurice L. J.
LaRoche Eugene R.
Mis David
Schechter Marc D.
U.S. Philips Corporation
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