Imaging lens assembly

Details Imaging lens assembly Imaging lens assembly

2010-04-15

2010-12-07

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S781000

Reexamination Certificate

active

07848032

ABSTRACT:
This invention provides an imaging lens assembly comprising, in order from an object side to an image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element with positive refractive power having a convex image-side surface; a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface, both being aspheric; a fourth lens element with positive refractive power having a convex object-side surface, both its two surfaces being aspheric; and a stop disposed between the first and second lenses.

REFERENCES:
patent: 7277238 (2007-10-01), Noda
patent: 7365920 (2008-04-01), Noda
patent: 7375903 (2008-05-01), Taniyama
patent: 2010/0020417 (2010-01-01), Lin

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