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:
Nov. 27, 2018
Filed:
Nov. 12, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Junya Ichimura, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens includes, in order from an enlargement conjugate side to a reduction conjugate side, a first lens unit (B) having a negative refractive power, a second lens unit (B) having a positive refractive power, a third lens unit (B) having a positive refractive power, a stop (sto), a fourth lens unit (B) having a positive refractive power, a fifth lens unit (B) having a negative refractive power, a sixth lens unit (B) having a negative refractive power, and a seventh lens unit (B) having a positive refractive power, and when zooming from a wide-angle end to a telephoto end, the second lens unit (B), the third lens unit (B), the fourth lens unit (B), the fifth lens unit (B), and the sixth lens unit (B) move from the reduction conjugate side to the enlargement conjugate side while a space between adjacent lens units changes.