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. 03, 2007
Filed:
Oct. 20, 2005
Ji-yong Zeng, Beijing, CN;
Guo-fan Jin, Beijing, CN;
Ying-bai Yan, Beijing, CN;
Zhuo Wang, Beijing, CN;
Min-qiang Wang, Beijing, CN;
Ji-Yong Zeng, Beijing, CN;
Guo-Fan Jin, Beijing, CN;
Ying-Bai Yan, Beijing, CN;
Zhuo Wang, Beijing, CN;
Min-Qiang Wang, Beijing, CN;
Tsinghua University, Beijing, CN;
Hon Hai Precision Industry Co., Ltd., Tu-cheng, Taipei Hsien, TW;
Abstract
An image pick-up lens system includes an aperture stop (), a biconvex first lens (), a second lens () having a concave surface on an object side, and a third lens () having a concave surface on an image side. The aperture stop (), the first lens (), the second lens () and the third lens () are aligned in that order from the object side to the image side. All lenses in the system are made from a plastic or resin material, and one of them has a diffraction grating formed on a surface. The system satisfies conditions (1)-(5) as disclosed, in order to provide compactness, cost-effectiveness and improved optical performance.