Photometer for reproduction machine

Details Photometer for reproduction machine Photometer for reproduction machine

1988-10-11

1990-06-05

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

38 71, 38 68, G03B 2772

Patent

active

049318276

ABSTRACT:
A photometer for a reproduction machine in which the light reflected from a document, illuminated with light through a slit, is condensed by a condensing lens, the condensed light is diffused by a diffusion plate, and then the diffused light is detected by a plurality of sensors for a photometric test. The sensors are arranged along the width of an image of the document formed through the slit. Therefore, a reliable photometric test can be made even on such a document which has different colors on opposite sides of the intermediate portion of the slit along its length.

REFERENCES:
patent: 3819373 (1974-06-01), Sable
patent: 4395108 (1983-07-01), Morse
patent: 4655579 (1987-04-01), Adachi et al.

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