Low profile episcopic projector

Details Low profile episcopic projector Low profile episcopic projector

1975-02-12

1976-04-20

Aegerter, Richard E.

Optics: image projectors

Episcope

Reflector between lamp and screen

353 65, G03B 2106, G03B 2108

Patent

active

039515354

ABSTRACT:
The design of a large copy projector is such that its projection path extends rearwardly and obliquely so that the projector and the viewing screen can be viewed side-by-side. This projector uses an opaque copy sheet characterized by an under specularly reflecting face that is accessible to the optical system from below but that can be marked from above by a chemical reactant ink from a user's pen or the like. Simultaneously, the upper face is unobstructedly available for direct observation and manual access and the lower face is unobstrusively available for imaging projection through a folded optical path below the copy sheet, which is established by a short throw, oblique incidence catadioptric optical system.

REFERENCES:
patent: 3837739 (1974-09-01), Altman

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