Dr. Johannes Heidenhain Gmbh

Udo Linnemann

Wolfgang Holzapfel

Walter Huber

Robert Sturm

A position measuring arrangement for determining a relative position between a first object and a second object. The arrangement includes a light source having a single-mode laser light source that generates radiation and a signal generator that receives the radiation and generates displacement-dependent output signals that determine a relative position between a first object and a second object. A feedback device, wherein the laser light source interacts with the feedback device in such a way that an excitation of several modes takes place in the single-mode laser light source, and a multi-mode operation of the single-mode laser light source results.

Position measuring arrangement

A position measuring system that includes a scale having an incremental graduation track of a defined incremental graduation period and on at least one defined reference position, a reference marking field with a mean reference marking graduation period. A scanning unit movable with respect to the scale, the scanning unit having a plurality of scanning elements for generating scanning signals, wherein at least two phase-shifted incremental signals are generated as scanning signals. A first evaluation device that determines a rough reference position. A second evaluation device that determines a beat signal phase. A third evaluation device, which is suitable for unequivocally marking a beat signal period from the rough reference position and, if a defined phase position exists, to issue a fine reference position from the beat signal phase.

Position measuring system

An optical position transducer is arranged to determine the relative position of two objects. The position transducer includes a scale and a scanning device that is movable in relation thereto. On sides of the scanning device, signal-generating device(s) are provided for generating positionally dependent scanning signals, among which at least one is a deflector element for selectively influencing a light beam's propagation direction. Positioned on sides of the scanning device are adjustment device(s) for spatially adjusting the deflector element, the adjustment device(s) arranged to enable merely one spatial alignment of the at least one deflector element.

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Traunreut, Germany

Udo Linnemann