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. 25, 2017
Filed:
Oct. 08, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Shoichi Takemoto, Saitama, JP;
Tomoyuki Nakamura, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens, including, in order from object side: a positive first unit which is fixed during zooming; a negative second unit which moves for zooming; a positive third unit which moves for zooming; a positive fourth unit which moves for zooming; and a positive fifth unit which is fixed during zooming, in which 1.50<LN(Z)/LN(Z)<2.30 and 0.70<f<0.96 are satisfied, where LN(Z) is natural logarithm of Zobtained by dividing a lateral magnification βof the second unit at telephoto end by a lateral magnification βat wide angle end, LN(Z) is natural logarithm of Zobtained by dividing a combined lateral magnification βof the third unit and the fourth unit at telephoto end by a combined lateral magnification βat wide angle end, and fand fare combined focal lengths of the third unit and the fourth unit at wide angle end and telephoto end, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile