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:
Jul. 10, 2018
Filed:
Jan. 26, 2017
Dr. Johannes Heidenhain Gmbh, Traunreut, DE;
Stefan Funk, Traunstein, DE;
Peter Speckbacher, Kirchweidach, DE;
DR. JOHANNES HEIDENHAIN GmbH, Traunreut, DE;
Abstract
A scale for an optically scanning position-measuring device includes a carrier and a reflective layer disposed on the carrier. A transparent spacer layer is disposed on the reflective layer. The spacer layer has a patterned, partially transparent layer thereon which defines a bright/dark pattern in which regions having the partially transparent layer appear dark and regions without the partially transparent layer appear bright. A sealing layer is disposed on the patterned, partially transparent layer. Products of refractive index and layer thickness are the same for the spacer layer and the sealing layer, or differ by an odd multiple.