Brinks Hofer Gilson & Lione
Position measuring method and apparatus for generating periodic signals free of harmonics
 A position measuring method and apparatus for obtaining signals substantially free of harmonics with the aid of a periodic graduation and a non-periodic or aperiodic scanning graduation, wherein the position of the grating lines n within the scanning graduation is determined in accordance with a statistical distribution. 
Dr. Johannes Heidenhain GmbH
G H H
G01D H03M H03M
inventional inventional additional
Wolfgang Andreas
Holzapfel Franz