Zoom lens

Details Zoom lens Zoom lens

2008-01-22

2008-01-22

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S686000, C359S753000, C359S781000

Reexamination Certificate

active

11598695

ABSTRACT:
A zoom lens is provided and has: a first lens of a negative lens; a second lens of a positive lens; an aperture stop; a third lens of a negative lens; and a fourth lens of a positive lens in this order from an object side of the zoom lens. A zooming operation of the zoom lens is performed by varying mutual distances among the first to fourth lenses, and the zoom lens satisfies specific conditional expressions.

REFERENCES:
patent: 2005/0128601 (2005-06-01), Minakata
patent: 2006/0072211 (2006-04-01), Imamura
patent: 9-211547 (1997-08-01), None
patent: 2003-177315 (2003-06-01), None
patent: 2005-4020 (2005-01-01), None

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