Distortion determination apparatus and method of determining a distortion
US12429570B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2021 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Aug 1, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A motion or saturation determination apparatus (100) comprising: a light source configured to emit light and an optoelectronic device (102) configured to receive an electromagnetic signal and to translate the signal to a plurality of electrical output signals corresponding to a plurality of predetermined phase offset values in accordance with an indirect time of flight measurement technique. A signal processing circuit (110, 116, 126, 132, 136) of the apparatus (100) is configured to process the electrical output signals to calculate a plurality of measurement vectors derived from the plurality of electrical signals. The vectors are in respect of a plurality of frequencies and comprise a first measurement vector for a fundamental harmonic frequency and a second measurement vector for a non-fundamental frequency. The circuit (110, 116, 126, 132, 136) is configured to calculate a scalar relating a first amplitude of the first vector to a second amplitude of the second vector, and to use the scalar to identify motion or saturation in respect of the optoelectronic device (102).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.