Brinks Hofer Gilson & Lione
Photoelectric position measuring system that optimizes modulation of a scanning device and the intensity of a reference mark signal
An incremental position measuring system in the form of a three-grating sensor is optimized in such a way, that the degree of modulation (M) of the incremental scanning device, as well as the intensity (I) of a reference marker signal are relatively strong. To this end, a phase grating with an effective phase deviation of &lgr;/4 is embodied on a scale 2, as well as a reference marker (R) in the form of an amplitude structure. A compact structure is achieved by the divergent illumination of the grating located in front of the scale.
Dr. Johannes Heidenhain GmbH
G G G
G01D G01D G01D
inventional inventional inventional
Wolfgang Andreas Elmar
Holzapfel Franz Mayer