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:
Feb. 09, 2021
Filed:
Mar. 04, 2019
Applicant:
Mitutoyo Corporation, Kanagawa, JP;
Inventor:
Hiroshi Sakai, Kanagawa, JP;
Assignee:
MITUTOYO CORPORATION, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/29 (2006.01);
U.S. Cl.
CPC ...
G02F 1/29 (2013.01); G02F 2001/294 (2013.01);
Abstract
In a variable focal length lens control method, a plurality of candidate planes are defined at different focal lengths of a variable focal length lens, an image of a measurable object is detected by an image detector at each of the candidate planes, contrast in each of the detected images is calculated, any of the candidate planes is selected based on the contrast, and a focal length of the selected candidate plane is defined for a lens controller.