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. 03, 2019
Filed:
Jun. 16, 2016
Applicant:
Zhejiang Dahua Technology Co., Ltd., Hangzhou, CN;
Inventors:
Kai Liu, Hangzhou, CN;
Feng Wang, Hangzhou, CN;
Hongxing Ding, Hangzhou, CN;
Xingming Zhang, Hangzhou, CN;
Qian Zhang, Hangzhou, CN;
Assignee:
ZHEJIANG DAHUA TECHNOLOGY CO., LTD., Hangzhou, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/177 (2006.01); G02B 13/18 (2006.01);
U.S. Cl.
CPC ...
G02B 15/142 (2019.08); G02B 13/18 (2013.01); G02B 15/177 (2013.01);
Abstract
A zoom lens system for providing high quality images with higher resolution includes a first lens group (), an aperture stop (), and a second lens group (). The first lens group has a positive or negative refractive power, and includes at least two lens elements having a negative refractive power and at least on lens element having a positive refractive power. The second lens group has a positive refractive power. A distance between a first and second lens group is not fixed.