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. 26, 1991
Filed:
Jan. 26, 1990
Isadore R Paley, Rockaway, NJ (US);
Allied Signal Inc., Morris Township, Morris County, NJ (US);
Abstract
An optical encoder features a transparent disc having three tracks arranged in a concentric configuration on the face thereof. One of the tracks has opaque markings in a particular pattern for determining a zero or starting angular reference for a rotating member. The other two tracks have opaque markings for providing high resolution, incremental angle information. Light is directed through the disc and light pulses are provided in accordance with the disposition of the markings on the respective tracks. The light pulses are converted to electrical pulses which are processed via suitable interface circuitry and a computer for determining the absolute angle through which the rotating member has rotated.