Intraoral 3D scanner employing light projectors with pattern generating optical elements
US11826225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2022 |
| Grant date | Nov 28, 2023 |
| Priority date | — |
| Expiry date | May 26, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30036
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for intraoral scanning comprises an elongate handheld wand comprising a probe at a distal end, one or more light projectors, and two or more cameras. Each light projector comprises at least one light source configured to generate light and a pattern generating optical element configured to generate a pattern of light when the light is transmitted through the pattern generating optical element. Each camera comprises a camera sensor and one or more lenses and is configured to capture a plurality of images that depict at least a portion of the projected pattern of light on an intraoral surface, wherein each camera is configured to focus at an object focal plane that is located between about 1 mm and about 30 mm from a lens of the one or more lenses that is farthest from the camera sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.