Optics: image projectors – Cabinet encloses projector and one side of screen – Reflector between lamp and screen
Patent
1979-01-31
1981-03-24
Haroian, Harry N.
Optics: image projectors
Cabinet encloses projector and one side of screen
Reflector between lamp and screen
G03B 2110, G03B 2128
Patent
active
042576946
ABSTRACT:
The invention relates to a projection system for diapositive film strips, comprising an essentially cubic projection box, the front side of which comprises a ground glass plate as screen and in the interior of which a projector and two reflecting mirrors are arranged to project the projecting beam exiting from the projector on to the ground glass plate, characterized in that the illumination means of the projector generating the projecting light is disposed such that its optical axis passing through the optical center of the objective forms an acute angle together with the optical axis of the objective and the principal ray of the projecting beam exiting from the projector is inclined toward that wall of the projection box at which the projector is located.
REFERENCES:
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patent: 1896928 (1933-02-01), White et al.
patent: 1952522 (1934-03-01), Warmisham
patent: 2100008 (1937-11-01), Stephens
patent: 2543561 (1951-02-01), Tracy
patent: 2763178 (1956-09-01), Gottschalk
patent: 3507571 (1970-04-01), White
patent: 3924941 (1975-12-01), Smith et al.
patent: 3963337 (1976-06-01), Lundberg
patent: 4037951 (1977-07-01), Aoki
Haroian Harry N.
Soding TV GmbH & Co. Bild & Ton International
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