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. 23, 2019
Filed:
Nov. 30, 2016
Applicant:
Tamron Co., Ltd., Saitama-shi, Saitama, JP;
Inventors:
Yoshito Iwasawa, Tokyo, JP;
Jun Takahashi, Ashigarakami-gun, JP;
Assignee:
TAMRON CO., LTD., Saitama-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/173 (2006.01); G02B 5/00 (2006.01); G02B 27/00 (2006.01); G02B 27/64 (2006.01);
U.S. Cl.
CPC ...
G02B 15/173 (2013.01); G02B 5/005 (2013.01); G02B 27/0025 (2013.01); G02B 27/646 (2013.01);
Abstract
A zoom lens has in order from the object side, at least a foremost, first lens group having positive refractive power, a succeeding, second lens group having negative refractive power, a third lens group having positive refractive power, and a rearmost lens group having negative refractive power. The zoom lens meets requirements as defined in formulas regarding a displacement of the first lens group, a focal length of the zoom lens at the wide-angle end, a focal length of the zoom lens at the telephoto end, a focal length of the first lens group, and a focal length of the third lens group.