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.:
Date of Patent:
Jul. 19, 2011
Filed:
Sep. 08, 2010
Applicants:
Wei-chen Zhan, Taichung, TW;
Jian-wei Lee, Taichung, TW;
Inventors:
Wei-Chen Zhan, Taichung, TW;
Jian-Wei Lee, Taichung, TW;
Assignee:
Asia Optical Co., Inc., Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/00 (2006.01); G02B 26/10 (2006.01); G02B 13/18 (2006.01); G02B 9/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens module of a scanner is provided, including a first lens with a positive diopter, a second lens with a negative diopter, a third lens with a positive diopter, and a fourth lens with a negative diopter. The first, second, third, and fourth lenses are sequentially arranged from an object end to an image end of the lens module, and at least one of the first and fourth lenses is an aspheric lens. The fourth lens has a focal length f4 and an objective side surface with a radius of curvature R7, wherein 0.1<R7/f4<1.