Computationally efficient structured light imaging system
US10753735B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2018 |
| Grant date | Aug 25, 2020 |
| Priority date | — |
| Expiry date | Dec 4, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V2201/121
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser source for use in a structured light projector includes a substrate, one or more first VCSELs on the substrate, and one or more second VCSELs on the substrate. The one or more first VCSELs each have a first aperture width and each separately extend above a surface of the substrate. The one or more second VCSELs each have a second aperture width different from the first aperture width, and each separately extend above a surface of the substrate. Using an array of VCSELs with different aperture widths provides emitted radiation having different wavelengths, thus providing different speckle patterns. When the different speckle patterns are averaged upon being received at the detector, speckle noise is reduced. The VCSEL can also include a plurality of subwavelength structures to steer the light output. Such subwavelength structures can also be used on the surface of other VCSELs, including standard VCSELs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.