Optical projection apparatus

Details Optical projection apparatus Optical projection apparatus

1977-08-16

1979-01-30

Stephan, Steven L.

Optics: image projectors

Cabinet encloses projector and one side of screen

Reflector between lamp and screen

353 99, G03B 2128

Patent

active

041369386

ABSTRACT:
An optical projection apparatus having foldable mirror members which permit the apparatus to be folded into a rigid, compact assembly for ease of installation and transportation. The apparatus comprises a double triangulated optical mirror structure which is interdependently mounted with the projector and screen without reference to the base section. The double triangulated structure provides the required optical rigidity while also folding or collapsing of the apparatus to reduce critical outer dimensions.

REFERENCES:
patent: D200823 (1965-04-01), Wells
patent: D209246 (1967-11-01), Wells
patent: 1390445 (1921-09-01), Jenkins
patent: 1988522 (1935-01-01), Stanley
patent: 2604005 (1952-07-01), Hahn
patent: 2767611 (1956-10-01), Fitzgerald
patent: 3247762 (1966-04-01), Peters
patent: 3381574 (1968-05-01), Wells
patent: 3437804 (1969-04-01), Schaefer et al.
patent: 3479116 (1969-11-01), Anderson
patent: 3488115 (1970-01-01), Nemec et al.

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