Apparatus for taking pictures against white backgrounds

Details Apparatus for taking pictures against white backgrounds Apparatus for taking pictures against white backgrounds

1995-09-25

1997-08-19

Rutledge, D.

Photography

With object illumination for exposure

Variable intensity control

346182, 346183, 346189, 355 70, 355 71, G03B 1503, G03B 2754

Patent

active

056598190

ABSTRACT:
An automatic photography apparatus has an object illuminating mechanism that has a high illumination mode and a low illumination mode. A switching control system is provided so that when the apparatus is used to photograph white background documents the illuminating mechanism is in the low illumination mode during the exposure setting periods; during the shutter-open period the illuminating mechanism is in the high illumination mode, so as to achieve sufficient exposure to capture the white background. The switching control system can be actuated to allow the camera to photograph documents and scenes having non-white backgrounds; in such situations the object illuminating mechanism is in the high illumination mode during the exposure lock-in stage and during the shutter-open stage.

REFERENCES:
patent: 3627416 (1971-12-01), Benson
patent: 3738748 (1973-06-01), Weihsmantel et al.
patent: 3860341 (1975-01-01), Tobias
patent: 3888583 (1975-06-01), Kiefer et al.
patent: 4290692 (1981-09-01), Svatek
patent: 4899188 (1990-02-01), Lecover

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