Displacement transducer with selectable detector area
US7515280B2 · kind B2 · utility
9Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2004 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | May 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A displacement measurement device has a detector area which is larger than the area of the beam spot reflected from the measurement surface. The detector area is made larger than the size of the beam spot on the detector area, in order to accommodate shifts in the location of the beam spot due to changes in the precise locations of the components of the displacement measurement device. The subset of pixels in the detector area having advantageous correlation characteristics, is then selected to perform the correlation calculation, thereby reducing data processing time requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.