Image reading apparatus

Details Image reading apparatus Image reading apparatus

1988-02-29

1989-12-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358163, 382 54, H01J 4014

Patent

active

048884928

ABSTRACT:
An image reader capable of uniform image signal output, in which the output signal obtained by reading an image of a reference document with an image reading device and the output signal obtained by reading a reference member with the image reading device are maintained at a constant ratio, and the ouput obtained by reading an original image is corrected according to the above-mentioned ratio.

REFERENCES:
patent: 4675533 (1987-06-01), Shimizu
patent: 4691365 (1987-09-01), Nagashima

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