Contrast control device for a slit-type copier exposure system
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United States of America Patent
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Mar 27, 1990
Grant Date -
N/A
app pub date -
Mar 23, 1989
filing date -
Mar 23, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An original document exposure device utilizes a bump exposure to control contrast by reducing the contrast in a reproduction image of the original document. The bump exposure is achieved by covering a portion of the field of view of the focusing system of an exposure lamp with a diffuse reflector. A portion of the exposure light is thus diffusely reflected into the focusing system and onto the photosensitive media. The degree of bump achieved is controlled by position adjustment of the reflector.
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