Vernier scan architecture for self-mixing interferometry phase measurements
US12379199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2021 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Jun 6, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of estimating a velocity of an object using an SMI sensor. The method includes driving a light emitter of the SMI sensor with a chirped waveform. The chirped waveform includes a first chirp and a second chirp separated by a first time interval, and a third chirp separated from the second chirp by a second time interval. The method also includes deriving a frequency-based velocity from an output of the SMI sensor; generating a first comb of possible velocities in response to analyzing an output of the SMI sensor generated in response to the first chirp and the second chirp; generating a second comb of possible velocities in response to analyzing an output of the SMI sensor generated in response to the second chirp and the third chirp; and determining a velocity of the object using the first comb, the second comb, and the frequency-based velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.