Diffractive optical element for beam splitting and design method therefor, and structured light projector
US12265215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2022 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Nov 24, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A design method for a diffractive optical element for beam splitting, comprising: S11, determining an input light field distribution and a target output light field distribution of a diffractive optical element; S12, constructing a beam splitting lattice of the diffractive optical element, wherein the light splitting lattice is used for performing array replication on light sources to realize the speckle lattice in a specific field of view, and the arrangement mode of the beam splitting lattice is regular arrangement or longitudinal and/or transverse periodic staggered arrangement; S13, disturbing the beam splitting lattice to reduce a deviation between an actual output light field and the target output light field, and limiting the disturbance quantity to ensure that there is no obvious overlap or gap between adjacent blocks in the speckle lattice; and S14, designing the diffractive optical element according to the disturbed beam splitting lattice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.