Optical sensing device and structured light projector
US10731976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Jul 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical sensing device configured to detect an object or features of the object is provided. The optical sensing device includes a structured light projector and a sensor. A structured light projector is configured to project a structured light to the object and includes a light source and at least one tunable liquid crystal diffractive optical element (LCDOE). The light source is configured to emit a light beam. The at least one tunable LCDOE is disposed on a path of the light beam and configured to convert the light beam into the structured light to form a structured light pattern on the object. The LCDOE is capable of controlling the structured light pattern by controlling voltage distribution to a liquid crystal layer in the LCDOE. The sensor is configured to sense a reflected light formed by the object reflecting the structured light. Besides, a structured light projector is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.