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:
Nov. 10, 2009
Filed:
May. 08, 2007
Jonathan M. Saint Clair, Seattle, WA (US);
Bing Wen, Camarillo, CA (US);
Jian MA, Thousand Oaks, CA (US);
Mitchell D. Voth, Lake Tapps, WA (US);
Jonathan M. Saint Clair, Seattle, WA (US);
Bing Wen, Camarillo, CA (US);
Jian Ma, Thousand Oaks, CA (US);
Mitchell D. Voth, Lake Tapps, WA (US);
The Boeing Company, Chicago, IL (US);
Abstract
An angle absolute encoder comprises a code rod encoded with code marks configured in segments, such that each successive segment has an increasing number of code marks, arranged at an angle to the rotation axis depending on the number of code marks in each segment. The angle of the code mark is determined by the number of code marks in the respective segment, the width of the segment parallel to the rotation axis of the code rod and the radius of the code rod. The angular resolution increases according to the number of code marks in each segment. Light is reflected from or transmitted through the code marks and detected by a light detector to determine absolute angle position.