Zoom lens, and electronic imaging system using the same

Details Zoom lens, and electronic imaging system using the same Zoom lens, and electronic imaging system using the same

2008-05-20

2008-05-20

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S683000

Reexamination Certificate

active

11487481

ABSTRACT:
A zoom lens with an easily bendable optical path has high optical specification performance such as a high zoom ratio, a wide-angle arrangement, a small F-number and reduced aberrations. It includes a first lens group G1remaining fixed during zooming, a second lens group G2having negative refracting power and moving during zooming, a third lens group G3having positive refracting power and moving during zooming, and a fourth lens group G4having positive refracting power and moving during zooming and focusing. The first lens group comprises, in order from an object side thereof, a negative meniscus lens component convex on an object side thereof, a reflecting optical element for bending an optical path and a positive lens. Upon focusing on an infinite object point, the fourth lens group G4moves in a locus opposite to that of movement of the third lens group G3during zooming.

REFERENCES:
patent: 3658411 (1972-04-01), Price
patent: 6104432 (2000-08-01), Nakamura et al.
patent: 6157494 (2000-12-01), Nagata
patent: 6304388 (2001-10-01), Shimo
patent: 6320701 (2001-11-01), Takatsuki
patent: 6333823 (2001-12-01), Ozaki et al.
patent: 6344932 (2002-02-01), Horiuchi
patent: 6353504 (2002-03-01), Yamamoto
patent: 6437925 (2002-08-01), Nishioka
patent: 6754446 (2004-06-01), Hagimori et al.
patent: 6870691 (2005-03-01), Konno
patent: 6975462 (2005-12-01), Mihara
patent: 7248293 (2007-07-01), Iwasawa
patent: 2002/0041445 (2002-04-01), Nishioka
patent: 2002/0057502 (2002-05-01), Ishii et al.
patent: 2003/0179464 (2003-09-01), Amanai
patent: 2005/0030405 (2005-02-01), Morooka
patent: 06-317750 (1994-11-01), None
patent: 08-248318 (1996-09-01), None
patent: 2000-131610 (2000-05-01), None
patent: 2001/059938 (2001-03-01), None
patent: 2001-305427 (2001-10-01), None
patent: WO 01/27677 (2001-04-01), None
Shashsin Kogyo (Photographic Industry) Mar. 2002 (pp. 104-105).

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