Photographic background device

Details Photographic background device Photographic background device

1978-03-31

1980-01-15

Hix, L. T.

350174, 354291, G02B 2714, G03B 1500, G03B 2900

Patent

active

041836448

ABSTRACT:
A photographic background device enables a photographer to include a scene reproduced on a film transparency as background for photographed subjects. A transparency is illuminated while a beam splitter mirror directs light from the illuminated transparency to the camera lens, while allowing light from the subject to pass through the mirror to the camera lens. A movable lens system of positive power is provided to allow the transparency image to appear in focus at the lens. Vignetting is alleviated by locating a concave mirror on the side of the beam splitter opposite the side on which the movable lens system is located. In this manner, the illuminated film transparency image will pass through the beam splitter, be reflected by the concave mirror back to the beam splitter and be reflected from the beam splitter to the camera lens.

REFERENCES:
patent: 2076103 (1937-04-01), Thorner
patent: 2619872 (1952-12-01), Shepard
patent: 2821105 (1958-01-01), Walker
patent: 3366438 (1968-01-01), Hartman
patent: 3376800 (1968-04-01), Faasch
patent: 3920320 (1975-11-01), Ellis et al.

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