Optical lens system for taking image

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

2011-06-07

2011-06-07

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S785000, C359S790000

Reexamination Certificate

active

07957075

ABSTRACT:
An optical lens system for taking image consisting of from the object side to the image side: an aperture stop; a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, at least one of the object-side and the image-side surfaces of the second lens element being aspheric; and a third lens element with positive refractive power having a convex object-side surface and a convex image-side surface, at least one of the object-side and the image-side surfaces of the third lens element being aspheric.

REFERENCES:
patent: 7236314 (2007-06-01), Liao
patent: 7372643 (2008-05-01), Li et al.
patent: 7423817 (2008-09-01), Nakanishi
patent: 2004/0179274 (2004-09-01), Amanai

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