Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1988-12-05
1990-01-16
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Illumination systems or details
G03B 2772
Patent
active
048946834
ABSTRACT:
There is disclosed a variable brightness light generator embodied in apparatus for exposing photographic film for test purposes. The generator includes a spherical mirror, a lamp at the center of the spherical form of the mirror and a modulator located between the lamp and the mirror for modulating the brightness of the image of the lamp created on the lamp by the mirror. The intensity of the light issuing from the lamp is sensed by a spectroradiometer which produces signals used in controlling the modulator whereby the intensity may be kept constant. The color temperature of the lamp is controlled under the influence of signals from the spectroradiometer. The exposing apparatus also includes a plurality of filters selectively insertable in the light path for modifying the intensity and color of the light incident on the film.
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McGuire Kevin P.
McKay James D.
Eastman Kodak Company
Turner John B.
Wintercorn Richard A.
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