Tilting mirror controlled using null-based interferometric sensing
US8174705B1 · kind B1 · utility
3Cited by
4References
17Claims
0Family size
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Key dates
| Filing date | Feb 17, 2010 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Dec 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mirror drive mechanism for a tilting mirror is controlled using feedback from one or more interferometric angular sensors. The wavelength of an optical beam is varied as it is fed into an interferometric angular sensor. The wavelength at which the resulting interference pattern is measured to be at a minimum intensity is determined. This wavelength is used to determine a distance quantity representative of the angular position of the mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.