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:
Aug. 20, 2002
Filed:
Oct. 13, 2000
Applicant:
Inventors:
Heinz-Günther Franz, Hamburg, DE;
Wolfgang Holzapfel, Obing, DE;
Assignee:
Dr. Johannes Heidenhain G.mbH, Traunreut, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/347 ;
U.S. Cl.
CPC ...
G01D 5/347 ;
Abstract
An opto-electronic linear, angular, or rotary position encoder is described. The device includes a light modulating code carrier comprising at least one coded track having adjacent light projecting and light non-projecting portions and an aperture structure disposed in a path of light being modulated by the code carrier. The device further includes a transparent substrate supporting at least one opto-electronic sensor chip facing the aperture structure, wherein the aperture structure is disposed on an aperture platelet, and the aperture platelet is joined to the substrate.