Slide projector for front and rear projection

Details Slide projector for front and rear projection Slide projector for front and rear projection

1994-02-22

1995-06-27

Cuchlinski, Jr., William A.

Optics: image projectors

Selective projection on distant or cabinet screen

353 82, 353 95, G03B 2110, G03B 2128

Patent

active

054284155

ABSTRACT:
A slide projector for both front and rear projection includes a shallow lens tunnel for mounting a simple wide-angle lens. In a first aspect, a second lens port is added to a conventional slide projector designed for front projection. A mirror pivots to invert and direct light rays from an illuminated slide to the simple wide-angle lens. In a second aspect, only the shallow lens tunnel is present and a rotating slide gate orients the slide, depending on operation in front or rear projection mode. Front projection in the second aspect requires a lens tunnel extension.

REFERENCES:
patent: 221573 (1879-11-01), Keevil
patent: 1134154 (1915-04-01), Patterson
patent: 1400958 (1921-12-01), Kelly
patent: 1461133 (1923-07-01), Marten
patent: 1904695 (1933-04-01), Plies
patent: 3387535 (1968-06-01), Bennett
patent: 3447869 (1969-06-01), Szymber
patent: 4331397 (1982-05-01), Jewison et al.

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