Adaptive laser power and ranging limit for time of flight sensor
US10823826B2 · kind B2 · utility
1Cited by
9References
20Claims
0Family size
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Key dates
| Filing date | May 25, 2017 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Nov 7, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time of flight range detection device includes a laser configured to transmit an optical pulse into an image scene, a return single-photon avalanche diode (SPAD) array, a reference SPAD array, a range detection circuit coupled to the return SPAD array and the reference SPAD array, and a laser driver circuit. The range detection circuit in operation determines a distance to an object based on signals from the return SPAD array and the reference SPAD array. The laser driver circuit in operation varies an output power level of the laser in response to the determined distance to the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.