Patent · US Expired

Optical position measuring device

US5963330A · kind A · utility

2Cited by

1References

30Claims

0Family size

Assignee

DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

Jan Braasch · Cham, DE
Christian Callimici · Miesbach, DE
Michael Allgauer · Traunreut, DE

Key dates

Filing date	Apr 24, 1997
Grant date	Oct 5, 1999
Priority date	—
Expiry date	Apr 24, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2201/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An optical position measuring device, in particular for a drive for precise positioning, is recited, which comprises two drive units which are movable in respect to each other, wherein one of the two drive units has a graduation as an integral component. The latter can be scanned by a scanning unit connected with the other drive unit for generating position-dependent output signals. The graduation is directly or indirectly disposed on a level surface of the drive unit, from which a distance between the two drive units is created in such a way that by the cooperation of the two drive units the generation of a defined relative movement between the two drive units is possible.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.