Image-forming apparatus and magnification correction method usin

Details Image-forming apparatus and magnification correction method usin Image-forming apparatus and magnification correction method usin

1996-12-30

1998-09-15

Grimley, Arthur T.

Electrophotography

Image formation

Exposure

355 55, 399201, G03G 1504, G03B 2734

Patent

active

058093818

ABSTRACT:
An image-forming apparatus includes an image-forming unit for image-forming image information of an original on a record medium, an optical-path-length varying unit for varying a distance between an object and an image, a driving unit for driving the image-forming unit and the optical-path-length varying unit in an interlocking manner such that the image information of the original is formed on the record medium at a plurality of magnifications, and a control unit for controlling the driving unit. In the structure, the image-forming unit and the optical-path-length varying unit are mounted to the driving unit such that the positions of the image-forming unit and the optical-path-length varying unit are adjustable relative to the driving unit. An appropriate magnification is obtained even if a focal length of the fixed-focus image-forming lens fluctuates due to errors occurring during its manufacturing process.

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