Exposure device in an image-forming machine

Details Exposure device in an image-forming machine Exposure device in an image-forming machine

1997-03-28

1998-11-10

Grimley, Arthur T.

Electrophotography

Image formation

Exposure

399212, 359813, G03G 1504, G03G 1528, G03G 1530

Patent

active

058358242

ABSTRACT:
An exposure device in an image-forming machine, in which an optical lens unit is able to reciprocatingly move in the direction of the optical axis, and the image of a document is exposed to the photosensitive surface of a photosensitive material through the optical lens unit. The optical lens unit includes a lens-holding plate which is able to reciprocatingly move in the direction of the optical axis, a lens center-adjusting plate which is disposed on the lens-holding plate so as to pivot on a positioning vertical shaft and so as to be secured, a lens mounted on the lens center-adjusting plate, and a light quantity correction plate which is mounted on the lens center-adjusting plate so as to move in the radial direction relative to the center of the lens. A guide member is provided for moving the light quantity correction plate in the radial direction relative to the center of the lens with the reciprocating motion of the lens-holding plate in the direction of optical axis.

REFERENCES:
patent: 4806989 (1989-02-01), Saito et al.
patent: 5465126 (1995-11-01), Fukuda

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