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:
Jun. 30, 2009
Filed:
May. 24, 2006
Ji-yong Zeng, Beijing, CN;
Guo-fan Jin, Beijing, CN;
Ying-bai Yan, Beijing, CN;
Min-qiang Wang, Beijing, CN;
Ji-Yong Zeng, Beijing, CN;
Guo-Fan Jin, Beijing, CN;
Ying-Bai Yan, Beijing, CN;
Min-Qiang Wang, Beijing, CN;
Tsinghua University, Beijing, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
An exemplary zoom lens system includes a negative first lens group and a positive second lens group. The first lens group includes a meniscus-shaped first lens with negative refracting power and a second lens with positive refracting power. The first lens has a concave surface facing an image side. The second lens group includes an aperture stop, a biconvex third lens with positive refracting power, and a meniscus-shaped fourth lens with negative refracting power. The fourth lens has a concave surface facing an object side. The first lens, the second lens, the aperture stop, the third lens and the fourth lens are aligned in that order from the object side to the image side.