Light exposure controller

Details Light exposure controller Light exposure controller

1985-12-18

1987-12-22

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 14E, G03B 2772

Patent

active

047149450

ABSTRACT:
A light exposure controller is provided for detecting a light amount reflected by an original document in a copying machine and controlling the light volume of a copy lamp illuminating the original document according to the detected light amount. The light exposure controller has an auto/manual control mode selector switch. When the automatic control mode is switched over to the manual mode, the light volume is set at a mean value of the light volume for the last automatic control mode copying operation.

REFERENCES:
patent: 4542985 (1985-09-01), Honma et al.
patent: 4640603 (1987-02-01), Honma

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