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. 04, 2022
Filed:
Aug. 30, 2019
Applicant:
Mitutoyo Corporation, Kanagawa, JP;
Inventors:
Shiro Igasaki, Kanagawa, JP;
Nobuo Ooba, Kanagawa, JP;
Masaki Okayasu, Tokyo, JP;
Yuki Kurahashi, Kanagawa, JP;
Assignee:
MITUTOYO CORPORATION, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/14 (2006.01); G02B 3/00 (2006.01); G02F 1/11 (2006.01); G02F 1/29 (2006.01);
U.S. Cl.
CPC ...
G02B 3/14 (2013.01); G02B 3/0081 (2013.01); G02B 3/0075 (2013.01); G02F 1/113 (2013.01); G02F 1/294 (2021.01);
Abstract
A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a refractive power controller that controls refractive power of the lens system. The refractive power controller adjusts the voltage of the drive signal in accordance with effective power that is supplied to the liquid lens apparatus.