Light field imaging device and method for 3D sensing
US12259563B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2020 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Apr 30, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/957
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light field imaging device may include a diffraction grating assembly configured to receive an optical wavefront from a scene and including one or more diffraction gratings. Each diffraction grating has a refractive index modulation pattern with a grating period along a grating axis and is configured to generate a diffracted wavefront. The device may also include a pixel array configured to detect the diffracted wavefront in a near-field region. The pixel array includes light-sensitive pixels and a pixel pitch along the grating axis that is equal to or larger than the grating period. Each pixel samples a portion of the diffracted wavefront and generates a pixel response. The pixels include groups or pairs of adjacent pixels, where the adjacent pixels in each group or pair have different pixel responses as a function of the angle of incidence of the optical wavefront. Light field imaging methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.