Television – Camera – system and detail – Low light level
Patent
1993-05-18
1994-12-13
Chin, Tommy P.
Television
Camera, system and detail
Low light level
348335, 348361, H04N 5238
Patent
active
053733207
ABSTRACT:
A camera attachment converts a standard day-light video camera into a day
ight-vision video camera. The attachment device has a threaded input and output to physically and optically interconnect an auto-iris lens to a video camera. The attachment device contains an image intensifier tube and a fiber optic image conduit either of which may be switched into the through optical path to receive and either amplify or simply conduct the light image to a relay lens. The relay lens focuses the output image from either the image tube or the fiber optic image conduit onto the optical input of the video camera. The switching of the image intensifier tube or the fiber optic image conduit is dependent upon the ambient light conditions of the camera so that if there is insufficient lighting for normal daytime viewing the image tube is activated and switched into the through optical path of the camera.
REFERENCES:
patent: 4551763 (1985-11-01), Swinehart et al.
patent: 4581648 (1986-04-01), Ganther
patent: 5159469 (1992-10-01), Takagi
Daley Thomas
Johnson David B.
Scott Allan W.
Chin Tommy P.
Cole Stanley Z.
Intevac, Inc.
Lenchak Emil P.
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