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:
Mar. 10, 2009
Filed:
Sep. 20, 2007
Yi-hao Kang, Hsinchu, TW;
Kai-yun Chen, Hsinchu, TW;
Yi-Hao Kang, Hsinchu, TW;
Kai-Yun Chen, Hsinchu, TW;
Young Optics, Inc., Hsinchu, TW;
Abstract
A fixed-focus lens including a first lens group, a second lens group and a third lens group, which are arranged in sequence from an object side to an image side, is provided. The first lens group has a negative refractive power and includes three lenses arranged from the object side to the image side. The lens, closest to the object side, of the first lens group is an aspheric lens. The second lens group has a positive refractive power and includes two lens arranged from the object side to the image side. The third lens group has a positive refractive power and includes six lenses arranged from the object side to the image side. Refractive powers of the lenses of the third lens group in sequence from the object side to the image side are negative, positive, negative, positive, positive and positive.