Optics: image projectors – Cabinet encloses projector and one side of screen – Reflector between lamp and screen
Patent
1978-05-01
1980-04-29
Shepperd, John W.
Optics: image projectors
Cabinet encloses projector and one side of screen
Reflector between lamp and screen
353 87, G03B 2110, G03B 2120
Patent
active
042003679
ABSTRACT:
A projector for a film transparency having a first housing for enclosing an image transmitting system and a second housing having an open end through which the illumination from a projection bulb supported within the second housing is adapted to pass. The first and second housings are adjustably coupled to each other such that when they are located in juxtaposed position the illumination from the bulb is directed into the first housing so as to project an image of the transparency film along an optical path defined by the transmitting system onto a rear projection screen mounted in one wall of the first housing. When the two housings are spaced from each other, the illumination from the lamp may be advantageously utilized for nonphotographic purposes, e. g., reading. Preferably, the rear projection screen is pivotally mounted to the first housing such that it may be moved out of alignment with the optical path thereby enabling the image to be projected onto a remote viewing surface.
REFERENCES:
patent: 2389087 (1945-11-01), Schubert
patent: 2473736 (1949-06-01), Stern
patent: 2704486 (1955-03-01), Wilson
patent: 3388249 (1968-06-01), Siegel et al.
patent: 3716293 (1973-02-01), Kitano et al.
patent: 3720462 (1973-03-01), Dali et al.
patent: 3751153 (1973-08-01), Naito
patent: 3904286 (1975-09-01), Omi et al.
patent: 4030821 (1977-06-01), Badalich
Corrigan Alfred E.
Polaroid Corporation
Shepperd John W.
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