Three-dimensional (3D) sensing system for determining 3D profile of object and method thereof
US11733033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2021 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Aug 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/29
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-dimensional (3D) sensing system for determining a 3D profile of an object and a method are provided. The 3D sensing system includes a first light source, a liquid crystal lens, a light detector and a control circuit. The first light source is configured to emit polarized light with a polarization setting for projecting a structured light pattern on the object. The liquid crystal lens in a polarization state allows incident light with the polarization setting to pass through and block incident light without the polarization setting from passing through. The light detector is configured to detect light reflected from the object and passing through the liquid crystal lens. When the 3D sensing system is in a 3D mode, the control circuit is configured to turn on the first light source and control the liquid crystal lens to enter the polarization state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.