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. 03, 2023
Filed:
Oct. 07, 2020
Applicant:
Mitutoyo Corporation, Kanagawa, JP;
Inventor:
Yuki Kurahashi, Tokyo, JP;
Assignee:
MITUTOYO CORPORATION, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 21/24 (2006.01); G02B 21/06 (2006.01); G02B 26/00 (2006.01); G02B 3/14 (2006.01);
U.S. Cl.
CPC ...
G02B 21/241 (2013.01); G02B 3/14 (2013.01); G02B 21/06 (2013.01); G02B 26/004 (2013.01);
Abstract
A variable focal length lens device includes: a variable focal length lens whose focal length cyclically changes in accordance with an inputted drive signal; an image detector configured to detect an image of a measurement target through the variable focal length lens; a pulsed light illuminator configured to emit a pulsed light to illuminate the measurement target; and an illumination controller configured to control the pulsed light illuminator so that the pulsed light is emitted twice in one cycle of the drive signal based on two detection phases corresponding to a designated focal distance of the variable focal length lens.