Laser tracking interferometric length measuring instrument and method of measuring length and coordinates using the same
US6563569B2 · kind B2 · utility
45Cited by
2References
4Claims
0Family size
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Key dates
| Filing date | Dec 29, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Apr 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser tracking interferometric length measuring instrument has a laser source and a tracking articulating optical lever provided on an optical path of an interferometric optical system. To track a retroreflector, the optical lever reflects a laser beam at the retroreflector, which reflects the beam back to the optical lever. This beam is reflected onto a quadrant photodiode. An attitude control means is used to control the attitude of the optical lever so that the laser beam reflected by the optical lever falls on the neutral point of the photodiode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.