Optical lens system for taking image

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

2008-12-27

2010-11-02

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S771000, C359S773000

Reexamination Certificate

active

07826149

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; an aperture stop; a second lens element with negative refractive power; a third lens element having a convex object-side surface; and a fourth lens element with negative refractive power having a concave object-side surface, an image-side surface of the fourth lens element being aspheric and formed with inflection points. A distance from the image-side surface of the fourth lens element to an image plane along an optical axis being BFL, a total track length of the optical lens system for taking image being TTL, and they satisfy the relation: BFL/TTL>0.12. In the optical lens system for taking image, the number of lens elements with refractive power being limited to four.

REFERENCES:
patent: 7289278 (2007-10-01), Jo et al.
patent: 7355801 (2008-04-01), Chen et al.
patent: 7453654 (2008-11-01), Shinohara
patent: 7558005 (2009-07-01), Yasuhiko
patent: 7609454 (2009-10-01), Yin et al.
patent: 2004/0136097 (2004-07-01), Park
patent: 2009/0015944 (2009-01-01), Taniyama
patent: 2009/0097135 (2009-04-01), Yang
patent: 2009/0257133 (2009-10-01), Sano et al.
patent: 2010/0020416 (2010-01-01), Tasi

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