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:
Aug. 29, 2006
Filed:
May. 13, 2004
Applicant:
Kenji Kojima, Kawasaki, JP;
Inventor:
Kenji Kojima, Kawasaki, JP;
Assignee:
Mitutoyo Corporation, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/34 (2006.01); G01B 11/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A photoelectric encoder includes an optical receipt chip on which a plurality of photodiodes (PDs) are laid out along a measurement axis 'X' so that these are organized into an array. The layout pitch of PDs disposed at end portions of the array is made less than the pitch of those at a central portion of the array. Similarly the width of a light acceptance surface of the former is less than that of the latter.