Method of operating a SMI sensor and corresponding sensor device
US8982334B2 · kind B2 · utility
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8Claims
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Assignee
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Key dates
| Filing date | Aug 10, 2010 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jul 21, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention refers to a method of operating a self-mixing interference sensor and a corresponding self-mixing interference sensor device. In the method the laser (1) of the device is controlled to periodically emit a laser pulse followed by an emission period of laser radiation having a lower amplitude. The pulse width of the laser pulse is selected such that the pulse after reflection at the object (3) re-enters the laser (1) during the emission period of laser radiation with lower amplitude. The corresponding SMI signal has an increased signal to noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.