Reproduction camera

Details Reproduction camera Reproduction camera

1983-10-05

1986-04-15

Adams, Russell E.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 68, 355 69, 355 71, G03B 2752, G03B 2772

Patent

active

045824207

ABSTRACT:
There is provided a reproduction camera comprising an optical sensor provided at a location to which light from a light source on the image side can be reached and which is substantially outside the image focal plane and not near by the same, a correcting device by which a quantity of light received by the optical sensor has a relation with a quantity of light received on the image focal plane, and a control system for controlling exposure according to a signal corrected by the correcting device.

REFERENCES:
patent: 3086434 (1963-04-01), Edelstein
patent: 3386358 (1968-06-01), Kropp
patent: 3872484 (1975-03-01), Hashimoto et al.
patent: 4113378 (1978-09-01), Wirtz
patent: 4171904 (1979-10-01), Tani
patent: 4264195 (1981-04-01), Tokuda et al.
patent: 4390270 (1983-06-01), Biederman et al.

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