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, 1992
Filed:
Oct. 25, 1990
Norio Okutani, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A position detection encoder includes a code plate having a plurality of slots formed therein, a first light emitting element and a first light receiving element disposed on one side of the code plate, and a second light emitting element and a second light receiving element disposed on another side of the code plate. A first light beam emitted from the first light emitting element and received by the second light receiving element passes simultaneously through a same one of the plurality of slits of the code plate as does a second light beam emitted from the second light emitting element and received by the first light emitting element. Detection signals having differing phases are respectively obtained from the first and second light receiving elements.