Displacement measuring apparatus
US6512222B2 · kind B2 · utility
2Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Feb 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The scale, of a displacement measuring apparatus, has an optical grating with a pitch &lgr;. The light detectors of the light detector array have a plurality of the stripe-patterned portions arranged at a pitch equal to &lgr; and a connecting portion interconnecting the stripe-patterned portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.