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:
Jan. 10, 2017
Filed:
May. 14, 2015
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 13/16 (2006.01); G02B 15/177 (2006.01); G02B 13/04 (2006.01); G02B 13/18 (2006.01); G02B 15/20 (2006.01); G03B 21/00 (2006.01); G03B 21/20 (2006.01); G02B 13/00 (2006.01); G02B 5/00 (2006.01); G02B 9/60 (2006.01); G02B 27/64 (2006.01);
U.S. Cl.
CPC ...
G02B 13/16 (2013.01); G02B 13/04 (2013.01); G02B 13/18 (2013.01); G02B 15/177 (2013.01); G02B 15/20 (2013.01); G03B 21/003 (2013.01); G03B 21/206 (2013.01); G03B 21/2073 (2013.01); G02B 5/005 (2013.01); G02B 9/60 (2013.01); G02B 13/002 (2013.01); G02B 13/009 (2013.01); G02B 13/0045 (2013.01); G02B 27/646 (2013.01); G03B 21/006 (2013.01);
Abstract
A projection zoom lens is constituted by: a negative first lens group; a positive moving second lens group; a positive moving third lens group; a positive final lens group; at least one lens group positioned between the final lens group and the third lens group; and an aperture stop provided between adjacent moving lens groups. The aperture stop is a variable stop, of which the aperture diameter changes such that the numerical aperture of the zoom lens becomes constant. The zoom lens satisfies Conditional Formulae below:2.8<  (1')φ<12  (2)