Multiple-mode frequency sharing for time-of-flight camera
US11619723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2019 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Jan 31, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Examples are disclosed herein that relate to a time-of-flight camera that performs phase unwrapping in an efficient manner. In one example, a time-of-flight camera includes a light emitter, a sensor array, and a controller. The controller is configured to select a frequency mode from a plurality of frequency modes, each frequency mode including two or more different frequencies, and at least two different frequency modes of the plurality of frequency modes having a common frequency shared between the at least two frequency modes, control the light emitter to illuminate a scene with modulated light of the two or more different frequencies of the frequency mode selected, control the sensor array to receive the modulated light reflected from objects within the scene, and process the modulated light received to determine unwrapped phases for the frequency mode selected based on the two or more different frequencies of the frequency mode selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.