Position determination apparatus
US4932131A · kind A · utility
58Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/0009
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position determination apparatus comprising a coordinate measuring machine having a scale. In addition, a read/write head and a laser interferometer system are provided, both of which can measure the position of a probe. The head writes signals derived from the interferometer onto the scale and is used either to lay down the periodic scale marks, or to write error correction values onto the scale. The scale is thus calibrated in situ on the machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.