Photographing optical lens assembly

Details Photographing optical lens assembly Photographing optical lens assembly

2009-03-18

2010-10-26

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S795000

Reexamination Certificate

active

07821724

ABSTRACT:
The present invention provides a photographing optical lens assembly comprising, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; and an aperture stop located in front of the first lens element; wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and they satisfy the relation: |V1−V2|<15; and wherein the number of the lens elements of the photographing optical lens assembly is limited to two. Such an arrangement of optical elements can effectively reduce the volume of the lens assembly and the sensitivity of the optical system and enable the lens assembly to obtain a higher resolution.

REFERENCES:
patent: 7463433 (2008-12-01), Tang
patent: 2004/0136098 (2004-07-01), Saito et al.
patent: 2006/0221467 (2006-10-01), Chen et al.

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