Area exposure machine

Details Area exposure machine Area exposure machine

1988-03-24

1989-08-01

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

362347, G03B 2772

Patent

active

048537497

ABSTRACT:
An area exposure machine for reproduction equipment and comprising an oblong light source (1) and a reflector behind the light source. The reflector is shaped substantially as an involute curve. As a result a uniform exposure of a relatively large area can be achieved, and the distance between the light source (1) and the area to be exposed can be reduced. As reflections towards the light source are avoided the consumption of energy can also be reduced. The reflector is advantageously composed of planar surfaces approximating an involute curve, and each planar surface is advantageously wedge-shaped whereby a more uniform exposure is obtained. The area exposure machine can for instance be used in connection with a contact printing box.

REFERENCES:
patent: 3125301 (1964-03-01), Stotter
patent: 3592544 (1971-07-01), Brendel
patent: 4295186 (1981-10-01), Sugiura et al.
patent: 4728993 (1988-03-01), Hilgers
"Principles of Reflecting Reflectors", Ed. K. Balslev, 1 LPNyt 471, Pub. by Louis Poulsen & Co. A/S , Jan. 28, 1983; pp. 4147-4154.

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