Zoom lens, camera, and mobile information terminal

Details Zoom lens, camera, and mobile information terminal Zoom lens, camera, and mobile information terminal

2006-06-20

2006-06-20

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S685000

Reexamination Certificate

active

07064902

ABSTRACT:
A first group optical system having a positive refracting power, a second group optical system having a negative refracting power, and a third group optical system having a positive refracting power are sequentially arranged from an object side toward an image side. At least the first group optical system and the third group optical system move so that a distance between the first group optical system and the second group optical system becomes minimum at short focal-length side, and a distance between the second group optical system and the third group optical system becomes minimum at long focal-length side. The third group optical system includes a triplet lens formed with a negative lens, a positive lens, and a negative lens.

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