Spatial frequency filter device for use with a laser beam, spatial frequency filter assembly having such a spatial frequency filter device, and method for spatial frequency filtering of a laser beam
US12032183B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2021 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Jan 14, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0988
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A spatial frequency filter device is for use with a laser beam. The device includes: a neutral region, which is configured to transmit or reflect the laser beam; and a deflecting region, which radially adjoins the neutral region and is configured to deflect beam components of the laser beam from a beam axis of the laser beam. The deflecting region has a constant portion, in which a deflecting effect on the beam components of the laser beam for each location in the constant portion is configured to be independent of a distance of a location from the neutral region. the deflecting region has a variation portion, in which the deflecting effect on the beam components of the laser beam is configured to vary, dependent on a distance from the neutral region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.