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:
Mar. 31, 1987
Filed:
Dec. 04, 1984
Toshiyasu Tanaka, Yokohama, JP;
Sadakazu Ariga, Yokohama, JP;
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A light-reflector type encoding method which comprises emitting light from one end of an optical fiber to a mobile body which moves relatively to said end of the optical fiber, through an optical lattice disposed at a fixed position relatively to said fiber end, receiving the reflected light from at least plural light-reflective graduations provided in the light-emitted zone of said mobile body through the optical lattice, and detecting the received reflected light with a photoelectric conversion element connected to the other end of the optical fiber. The present invention also provides a light-reflective type encoder suitable for carrying out the encoding method.