Fast scanning large field-of-view devices for depth sensing
US10388026B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2017 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Oct 25, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/2226
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A depth camera assembly (DCA) for depth sensing of a local area. The DCA includes a structured light generator, an imaging device, and a controller. The structured light generator illuminates the local area with structured light. The structured light generator includes an acousto-optic deflector (AOD) and a liquid crystal device (LCD). The AOD functions as one or more dynamic diffraction gratings that diffract one or more optical beams to form diffracted scanning beams. The LCD includes one or more liquid crystal gratings (LCGs) that diffract the diffracted scanning beams to form the structured light projected into the local area. The imaging device captures portions of the structured light reflected from one or more objects in the local area. The controller determines depth information for the one or more objects based on the captured portions of the reflected structured light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.