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:
Apr. 18, 2006
Filed:
Nov. 23, 2004
Gung-hsuan Ho, Hsinchu, TW;
Chir-weei Chang, Hsinchu, TW;
Gung-Hsuan Ho, Hsinchu, TW;
Chir-Weei Chang, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A zoom lens for digital image capturing apparatus is a shared lens of digital static cameras and digital video cameras. It contains three lens groups. From the object plane to the image plane, the first lens group has a negative refractive power, the second lens group has a positive refractive power, and the third lens group has a positive refractive power. As the focal length of the zoom lens changes from long (telescope) to short (wide-angle), the second lens group moves from the object plane to the image plane. The third lens group and the first lens group move with the second lens group.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile