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:
Dec. 27, 2022
Filed:
Dec. 26, 2018
Applicant:
Nittoh Inc., Suwa, JP;
Inventor:
Keiichi Mochizuki, Suwa, JP;
Assignee:
NITTOH INC., Suwa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/177 (2006.01); G02B 13/02 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/177 (2013.01); G02B 13/02 (2013.01); G02B 27/0025 (2013.01);
Abstract
A lens system () for image pickup includes, in order from an object side (), a first lens group (G) that has negative refractive power and is fixed during focusing, a second lens group (G) that has positive refractive power and moves during focusing, a third lens group (G) that has positive refractive power and is fixed during focusing, and a fourth lens group (G) that has a stop disposed on the object side, is disposed closest to an image plane side, has positive refractive power, and is fixed during focusing. The first lens group includes a first lens (L) with positive refractive power that is disposed closest to the object side.