Using integrated silicon LED to calibrate phase offset in optical receiver in laser range finder
US10451715B2 · kind B2 · utility
3Cited by
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17Claims
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Key dates
| Filing date | Mar 14, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Feb 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of the present disclosure use an “on chip” silicon LED to generate a light signal for calibration of a range finder. The light signal from the silicon LED may be detected by photo detectors in a reference path and a receive path of the range finder to generate a calibration phase offset, which may be subtracted out from a phase offset measurement of the range finder to correct the phase offset measurement for component mismatch due to, for example, environment, process variation, aging, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.