Depth sensing using optical time-of-flight techniques through a transmissive cover
US12313779B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Nov 13, 2019 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Sep 11, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2007/4975
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques for determining dynamically the intensity of the reflection from a transmissive cover and neutralizing it so as to improve the accuracy of depth measurements. Depth measurements of light modulation at multiple frequencies—which also can be used for depth disambiguation—are obtained and used to decouple the information to estimate the intensity of the signal reflected by the transmissive cover itself or a smudge on the transmissive cover, and the intensity of the signal reflected by the target object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.