Signal accumulation image reading apparatus

Details Signal accumulation image reading apparatus Signal accumulation image reading apparatus

1989-10-18

1991-07-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358486, H01J 4014

Patent

active

050327127

ABSTRACT:
Image reading equipment has a light source for irradiating an original image, a reader for photoelectrically reading the original image, a detector for detecting a peak output level of said reader and a controller for controlling a read operation by the thus detected peak level. The original image is scanned at a speed appropriate for the light quantity exposing the original so that a stable reading of the original is realized even when the quantity of exposing light is deficient.

REFERENCES:
patent: 4160279 (1979-07-01), Fuwa
patent: 4413287 (1983-11-01), Torpic et al.
patent: 4591727 (1986-05-01), Gaebelein
patent: 4814597 (1989-03-01), Kruger et al.

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