Device for achieving a substantially uniform distribution of the light in the picture plane of a reproduction camera
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United States of America Patent
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-
Sep 19, 1989
Issued Date -
N/A
app pub date -
Jan 5, 1989
filing date -
May 2, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for achieving a substantially uniform distribution of the light in the picture plane of a reproduction camera by providing a suitable distribution of the light in the original plane (8), whereby the desired distribution of the light in the original plane is obtained by means of illuminating means comprising adjustable screening members (12). According to the invention the screening members are adjusted by means of a computer in response to the desired enlargement. A light sensor adjacent the picture plane compensates automatically for the influence of the screening members on the main exposure.
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