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:
Dec. 29, 2009
Filed:
Dec. 10, 2008
Hsin-te Chen, Hsinchu, TW;
Kuo-chuan Wang, Hsinchu, TW;
Hsin-Te Chen, Hsinchu, TW;
Kuo-Chuan Wang, Hsinchu, TW;
Young Optics Inc., Hsinchu, TW;
Abstract
A fixed-focus lens including a first lens, a second lens, a cemented lens, an aperture stop, and a fifth lens is provided. The first lens disposed between an object side and an image side has a negative refractive power. The second lens disposed between the first lens and the image side has a positive refractive power. The cemented lens is disposed between the second lens and the image side. The cemented lens consists of a third lens and a fourth lens arranged in sequence from the object side to the image side. One of the third lens and the fourth lens has a positive refractive power, and the other has a negative refractive power. The aperture stop is disposed between the fourth lens and the image side. The fifth lens disposed between the aperture stop and the image side has a positive refractive power.