Phase angle correction value calculation apparatus and method of calculating a phase angle correction value
US12320928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2020 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Jun 13, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A phase angle error calculation apparatus (100) comprising a light source (102) that emits light according to an indirect time of flight (iToF) measurement technique. A photonic mixer cell (104) generates and stores a plurality of electrical output signals corresponding to a plurality of predetermined phase offset values. A signal processing circuit processes the electrical output signals according to the iToF measurement technique in order to calculate a reference vector and a reference phase angle therefrom. The output signals correspond to measurement at a first level of precision. The circuit processes a subset of output signals according to the iToF measurement technique and calculates a measurement vector and a measurement phase angle therefrom. The subset of the output signals corresponds to measurement at a second level of precision lower than the first level of precision. The circuit calculates a phase angle correction value using the reference phase angle and the measurement phase angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.