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:
Jul. 04, 2006
Filed:
Feb. 06, 2003
Hiroshi Iguchi, Okayama, JP;
Ikuo Takeda, Osaka, JP;
Hirokazu Yauchi, Kyoto, JP;
Arata Nakamura, Osaka, JP;
Hiroshi Iguchi, Okayama, JP;
Ikuo Takeda, Osaka, JP;
Hirokazu Yauchi, Kyoto, JP;
Arata Nakamura, Osaka, JP;
OMRON Corporation, Kyoto, JP;
Abstract
An optical encoder including a graduation plate inscribed with a graduation line along a predetermined direction and an optical reader for optically reading the graduation line on the graduation plate in which a corresponding electric signal is outputted from the optical reader in accordance with movement of the graduation plate and the optical reader relative to each other, the optical reader includes a light projecting optical system for irradiating light from a light projecting source to the graduation plate and a light receiving optical system for focusing light from the graduation plate to a light receiving portion and the light receiving optical system is constituted by a telecentric optical system to thereby enable to be fabricated at low cost by dispensing with high integrating accuracy.