Variable magnification optical system

Details Variable magnification optical system Variable magnification optical system

2006-06-27

2006-06-27

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S678000, C359S726000

Reexamination Certificate

active

07068440

ABSTRACT:
The present invention provides a variable magnification optical system for forming an optical image of an object on the light-receiving surface of an image sensor with a variable magnification. The variable magnification optical system includes an optical construction comprising, from an object side, a first reflective surface, a first movable unit, a second reflective surface, and a second movable unit. The optical axis is bent at substantially ninety degrees by the first reflective surface and is further bent by the second reflective surface, and, during magnification variation from the wide-angle end to the telephoto end, the first and second reflective surfaces are kept in fixed positions with respect to the image surface, and the first and second movable units move along the optical axis. The variable magnification optical system fulfills a prescribed conditional formula.

REFERENCES:
patent: 6671461 (2003-12-01), Tochigi
patent: 6754446 (2004-06-01), Hagimori et al.
patent: 2004-170707 (2004-06-01), None

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