Scanning self-mixing interferometry system and sensor
US11536555B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Feb 3, 2021 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Feb 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Self-mixed interferometer (SMI) devices and techniques are described for measuring depth and/or velocity of objects. The SMI devices and techniques may be used for eye-tracking. A light source of an SMI sensor emits coherent light that is directed to a target location with a scanning module. One or more SMI signals are measured. The one or more SMI signals are generated by the SMI sensor in response to feedback light received from the target location. The feedback light is a portion of the coherent light that illuminated the target location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.