Optical lens system for taking image

Details Optical lens system for taking image Optical lens system for taking image

2008-02-12

2010-06-15

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S772000

Reexamination Certificate

active

07738186

ABSTRACT:
An optical lens system for taking image comprises, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave image-side surface and at least one aspheric surface; a meniscus third lens element with negative refractive power having a convex image-side surface; and a fourth lens element with negative refractive power having a convex object-side surface and an aspheric image-side surface. The above configurations and arrangements of the lens elements can effectively reduce the size of the optical system while improving its resolution.

REFERENCES:
patent: 2006/0238898 (2006-10-01), Shinohara

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