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:
Sep. 15, 2009
Filed:
Jun. 22, 2007
Applicant:
Hiroaki Kawada, Kanagawa, JP;
Inventor:
Hiroaki Kawada, Kanagawa, JP;
Assignee:
Mitutoyo Corporation, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/10 (2006.01); G02B 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides: a lens optical system having a lens and a plastic block having two parallel planes, the plastic block being provided between the lens and a focal position of the lens to suppress a variation of a focal length due to a temperature change, and a photoelectric encoder including the lens optical system.