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. 31, 2017
Filed:
Feb. 26, 2015
Applicant:
Keyence Corporation, Osaka, JP;
Inventor:
Masayasu Ikebuchi, Osaka, JP;
Assignee:
Keyence Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 11/14 (2006.01); G01B 11/00 (2006.01); G01B 5/008 (2006.01);
U.S. Cl.
CPC ...
G01B 11/005 (2013.01); G01B 5/008 (2013.01);
Abstract
Provided is an optical coordinate measuring device that prevents deterioration in measurement accuracy. A holding member is made of a material having low moisture absorption properties and a small linear expansion coefficient. A marker member is held by the holding member. The marker member includes a plate member made of glass. A light shielding mask is formed by printing on one surface of the plate member except for a plurality of circular regions. A light emitting substrate is arranged below the marker member. A plurality of light emitting elements are mounted on the upper surfaces of the light emitting substrates.