Image reading apparatus

Details Image reading apparatus Image reading apparatus

1989-12-28

1991-01-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358483, H01J 4014

Patent

active

049856200

ABSTRACT:
In an image reading apparatus having a fluorescent lamp as a light source, the apparatus is so arranged that a so-called shading along a lengthwise direction of the fluorescent lamp and an effection caused by a change of a light amount of the fluorescent lamps are compensated simultaneously. Thus, in the image reading apparatus, it is possible to read an image of an original in a simple structure without being affected by the shading of the light source and a change of the light amount due to secular distortion. Thereby, the number of parts of the image reading apparatus becomes small and it can be produced at a low cost.

REFERENCES:
patent: 4680644 (1987-07-01), Shirato et al.

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