Optical lens system for taking image

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

2011-03-29

2011-03-29

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S784000

Reexamination Certificate

active

07916401

ABSTRACT:
An optical lens system for taking image comprises, in order 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 convex image-side surface; a plastic second lens element with negative refractive power having a concave object-side surface, a convex image-side surface and at least one aspheric surface; a plastic third lens element with negative refractive power having a convex object-side surface, a concave image-side surface and at least one aspheric surface. The number of the lens elements with refractive power being limited to three. Focal lengths of the optical lens system, the first lens element, the second lens element and the third lens element are f, f1, f2, f3respectively; Abbe numbers of the first and second lens elements are V1, V2respectively, an on-axis distance between second and third lens elements is T23, and they satisfy the relations: 0.8<f/f1<1.8; 0<|f/f2|<0.8; 0<|f/f3|<0.7; 20<V1−V2<38; 0.13<T23/f<0.21.

REFERENCES:
patent: 6970306 (2005-11-01), Matsuo
patent: 6977779 (2005-12-01), Shinohara
patent: 7130133 (2006-10-01), Sun
patent: 7196855 (2007-03-01), Yamaguchi
patent: 7212354 (2007-05-01), Sun
patent: 7408725 (2008-08-01), Sato
patent: 2010/0202065 (2010-08-01), Tang et al.

Affiliated with

Also associated with

Rating

Optical lens system for taking image does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical lens system for taking image, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical lens system for taking image will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2649896