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:
Jun. 30, 2009
Filed:
Jun. 26, 2007
Applicant:
Hiroaki Kawada, Kanagawa, JP;
Inventor:
Hiroaki Kawada, Kanagawa, JP;
Assignee:
Mitutoyo Corporation, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A photoelectric encoder using a lens array for dividing an image of a scale pattern into a plurality of regions to be detected and focusing them onto an array of light receiving elements, comprises, between the scale pattern and the lens array, a light-shielding array for reducing the effect of external disturbance light. The light-shielding array may be formed as a thin film pattern on a lens array side of a transparent cover glass which provides internal protection.