Measuring graduation and photoelectric position measuring device having the same
US9453744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2014 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Oct 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring graduation includes a phase grating for a photoelectric position measuring device for measuring positions in a first direction and in a second direction extending orthogonally to the first direction. The phase grating has a periodic array of grating elements in the first direction and in the second direction. The grating elements each have an outer contour that is formed by a continuous line which includes two mutually opposing first straight edges, two mutually opposing second straight edges extending perpendicularly to the first straight edges, and connecting lines extending between the first straight edges and the second straight edges. The connecting lines form an obtuse angle with the first straight edges and with the second straight edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.