Variable magnification optical apparatus

Details Variable magnification optical apparatus Variable magnification optical apparatus

1982-02-01

1984-07-03

Truhe, J. V.

Photocopying

Including fiber optics

355 11, 355 60, 355 66, G03G 1504

Patent

active

044576161

ABSTRACT:
A variable magnification optical apparatus for projecting an image at a first plane onto a second plane includes an optical system for forming an image of the first plane on the second plane, a first mirror disposed between the image-forming optical system and the first plane and a second mirror disposed between the image-forming optical system and the second plane. When the magnification is changed, the first mirror is rotated by a determined angle of .theta. and the second mirror is moved in a determined direction while rotating also by the same angle .theta.. The image-forming optical system is moved in the direction along its optical axis and is rotated by an angle two times larger than the rotation angle .theta. of the first mirror at the same time.

REFERENCES:
patent: 3286587 (1966-11-01), Hayden et al.
patent: 4116562 (1978-09-01), Libby et al.
patent: 4129379 (1978-12-01), Ogrisek et al.
patent: 4353643 (1982-10-01), Statt
IBM Technical Disclosure Bulletin, vol. 15, No. 4, Sep. 1972, Portig, H., "Two-Mirror Copier Scanner."
Research Disclosure, Industrial Opportunities Ltd., England, No. 148, Aug. 1976, p. 12, 14820, Day, P. B., "Size Reduction Imaging Means."

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