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:
May. 12, 2009
Filed:
Dec. 02, 2003
Koichi Kudo, Tokyo, JP;
Takuroh Kamiya, Tokyo, JP;
Katsuya Kawagoe, Tokyo, JP;
Ryuuichi Mimbu, Tokyo, JP;
Junya Takigawa, Tokyo, JP;
Toshiyuki Andoh, Tokyo, JP;
Yoshihiro Sakai, Tokyo, JP;
Koichi Kudo, Tokyo, JP;
Takuroh Kamiya, Tokyo, JP;
Katsuya Kawagoe, Tokyo, JP;
Ryuuichi Mimbu, Tokyo, JP;
Junya Takigawa, Tokyo, JP;
Toshiyuki Andoh, Tokyo, JP;
Yoshihiro Sakai, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical encoder includes a light emitting unit that emits parallel light onto a plurality of marks that are arranged on an object such as a rotor or a belt, at a predetermined interval in a moving direction of the object, and a light receiving unit that receives light modulated by the marks. The parallel light is generated by a collimating lens.