Diffractive optical elements
US12372800B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2021 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | May 2, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Techniques for designing diffractive optical elements (DOEs) such as diffusers and other optical beam shaping elements can include designing a DOE unit cell on a smaller area than the overall area of the DOE, and then distributing the unit cell across the entire surface for the DOE. Height translations are introduced for at least some of the unit cells distributed across the surface, where the height translations correspond to respective phase translations for the intended operational wavelength of the DOE. In some instances, phase wrapping is introduced to translate the height variations among the unit cells into unit cells having sub-unit structures whose heights fall within a range that corresponds to a specified phase range at the operational wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.