Position-measuring device
US8711367B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2010 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | May 3, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position-measuring device, for ascertaining the position of two objects which are disposed in a manner allowing movement relative to each other in at least one measuring direction, includes a light source, as well as a splitting device by which a light beam, provided by the light source, is split into two or more partial beams of rays. The partial beams of rays traverse at least two partial-beam paths. Interfering partial beams of rays from the partial-beam paths strike a plurality of opto-electronic detector elements, so that displacement-dependent position signals are ascertainable via the detector elements. The light source takes the form of a semiconductor laser having a fiber-grating feedback device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.