Image reading apparatus

Details Image reading apparatus Image reading apparatus

1998-09-08

2000-02-29

Moses, Richard

Electrophotography

Image formation

Exposure

355 55, G03G 15041

Patent

active

060320095

ABSTRACT:
In an image reading apparatus, an image is illuminated to be guided as a light beam to a photosensitive drum through an image forming lens. Light amount correcting members are attached to a movable member movably attached relatively to the image forming lens. The movable member moves in the optical axis direction in accordance with movement of the image forming lens, and one of the light amount correcting members farther from the image forming lens is caused to face a corresponding surface of the image forming lens so as to intercept a part of the light beam from the image in association with the movement of the movable member. The other of the light amount correcting members closer to the image forming lens is caused to retract from a corresponding surface of the image forming lens in association with the movement of the movable member.

REFERENCES:
patent: 3438704 (1969-04-01), Schoen
patent: 4113373 (1978-09-01), Eppe et al.
patent: 4806989 (1989-02-01), Saito et al.
patent: 5283698 (1994-02-01), Fukuzawa et al.
patent: 5355198 (1994-10-01), Saito
patent: 5412201 (1995-05-01), Fukuzawa et al.
patent: 5854688 (1998-12-01), Fukuzawa

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