Lens system

Details Lens system Lens system

2008-12-25

2010-06-22

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S754000

Reexamination Certificate

active

07742242

ABSTRACT:
A lens system includes, in order from the object side, a positive refractive power first lens, a positive refractive power second lens; and a negative refractive power third lens. Wherein the lens system satisfies the following conditions: (1) (|G1R2|−G1R1)/(|G1R2|+G1R1)<0.5; and (2) 0.2<G1R1/F<0.6, wherein, G1R1is the radius of curvature of a surface of the first lens facing the object side of the lens system, G1R2is the radius of curvature of the surface of the first lens facing the image side of the lens system, and F is a focal length of the lens system.

REFERENCES:
patent: 6795253 (2004-09-01), Shinohara
patent: 6987625 (2006-01-01), Nakamura

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