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:
May. 18, 2010
Filed:
Jul. 29, 2004
Peter Speckbacher, Kirchweidach, DE;
Josef Weidmann, Trostberg, DE;
Christopher Eisele, Traunwalchen, DE;
Elmar Mayer, Nussdorf, DE;
Reiner Burgschat, Jena, DE;
Peter Speckbacher, Kirchweidach, DE;
Josef Weidmann, Trostberg, DE;
Christopher Eisele, Traunwalchen, DE;
Elmar Mayer, Nussdorf, DE;
Reiner Burgschat, Jena, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
A scanning head for an optical position-measuring system includes a receiver grating, formed of photosensitive areas, for the scanning of locally intensity-modulated light of differing wavelengths. The receiver grating is formed from a semiconductor layer stack of a doped p-layer, an intrinsic i-layer and a doped n-layer. The individual photosensitive areas have a first doped layer and at least a part of the intrinsic layer in common and are electrically separated from one another by interruptions in the second doped layer.