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. 07, 1992
Filed:
May. 25, 1990
Applicant:
Inventor:
Michael Allgauer, Stein, DE;
Assignee:
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356356 ; 356354 ; 2502 / ; 385 14 ;
Abstract
A photoelectric measuring device for measuring the relative position between two objects utilizing interfering lightwave patterns is provided. Two diffraction gratings having an equal grid constants are provided to perpendicularly impinge beam bundles into circular coupling-in gratings of the integrated optical circuit. In addition, an integrated light source may be coupled-out of the integrated optical circuit.