Image pick-up lens, image pick-up unit, and mobile terminal...

Details Image pick-up lens, image pick-up unit, and mobile terminal... Image pick-up lens, image pick-up unit, and mobile terminal...

2004-07-01

2008-09-02

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Optics

C359S791000

Reexamination Certificate

active

07420609

ABSTRACT:
An image pickup lens includes in order from an object side of the image pickup lens: a first lens having positive refractive power whose convex surface faces the object side of the image pickup lens; an aperture stop; a meniscus shaped second lens having positive refractive power whose convex surface faces an image side of the image pickup lens; and a third lens having negative refractive power whose concave surface faces the image side of the image pickup lens, wherein the image pickup lens satisfies the following conditional expressions:in-line-formulae description="In-line Formulae" end="lead"?0.8<f1/f<2.0  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?20<((ν1+ν2)/2)−ν3<70  (2)in-line-formulae description="In-line Formulae" end="tail"?where f1is a focal length of the first lens, f is a focal length of a total system of the image pickup lens, and ν1, ν2and ν3are the Abbe constants of the first to third lenses respectively.

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patent: 1 271 216 (2003-01-01), None
patent: 2001-075006 (2001-03-01), None

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