The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 7742242 B1

PDF
Full Text
Expired
Date of Patent:
Jun. 22, 2010

Filed:

Dec. 25, 2008
Applicants:

Kuo-yen Liang, Taipei Hsien, TW;

Chun-hsiang Huang, Taipei Hsien, TW;

Inventors:

Kuo-Yen Liang, Taipei Hsien, TW;

Chun-Hsiang Huang, Taipei Hsien, TW;

Assignee:

Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/12 (2006.01);
U.S. Cl.
CPC ...
Abstract

A lens system includes, in order from the object side, a positive refractive power first lens, a positive refractive power second lens; and a negative refractive power third lens. Wherein the lens system satisfies the following conditions: (1) (|GR|−GR)/(|GR|+GR)<0.5; and (2) 0.2<GR/F<0.6, wherein, GRis the radius of curvature of a surface of the first lens facing the object side of the lens system, GRis the radius of curvature of the surface of the first lens facing the image side of the lens system, and F is a focal length of the lens system.


Find Patent Forward Citations

Liang, Kuo-Yen. (2010). Lens system (U.S. Patent No. 7742242). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7742242

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