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. 24, 2020
Filed:
Apr. 06, 2018
Applicant:
Mitutoyo Corporation, Kanagawa, JP;
Inventors:
Shiro Igasaki, Kanagawa, JP;
Nobuo Ohba, Kanagawa, JP;
Koji Kubo, Tokyo, JP;
Takahisa Ootake, Kanagawa, JP;
Assignee:
MITUTOYO CORPORATION, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); H04N 5/225 (2006.01); H04N 5/232 (2006.01); G06K 9/32 (2006.01); G02B 7/08 (2006.01); G02B 3/14 (2006.01); G02B 7/28 (2006.01); G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/14 (2013.01); G02B 3/0087 (2013.01); G02B 3/14 (2013.01); G02B 7/08 (2013.01); G02B 7/28 (2013.01); G06K 9/3241 (2013.01); H04N 5/2253 (2013.01); H04N 5/2256 (2013.01); H04N 5/232 (2013.01); H04N 5/23212 (2013.01); H04N 5/2254 (2013.01);
Abstract
A variable focal length lens device includes: a lens system whose refractive index changes depending on an inputted drive signal; an objective lens disposed in an optical axis common to the lens system; an image detector for detecting an image of a target object through the lens system and the objective lens; a resonance-lock controller for locking the frequency of the drive signal to a resonance frequency of the lens system; and a resonance-lock operation unit for switching enabling and suspending the resonance-lock controller.