Optical correction device

Details Optical correction device Optical correction device

1987-05-06

1989-02-21

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 8, 355 14E, 355 67, 355 71, G03G 1500

Patent

active

048069892

ABSTRACT:
The present invention provides an optical correction device capable of correcting an exposure distribution so as to be flat at an image receiving surface such as a photoreceptor of copying machine, in spite of varying a projection magnification of original image on the image receiving surface. Additionally, the optical correction device can correct an exposure amount on the image receiving surface so as to be substantially same level throughout all available magnifications.

REFERENCES:
patent: 3967894 (1976-07-01), Tsilibes
patent: 4072413 (1978-02-01), Amess
patent: 4172658 (1979-10-01), Tani et al.
patent: 4716442 (1987-12-01), Yazaki

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