Method and device for generating airy light needle with long depth of focus and high aspect ratio
US12379589B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 13, 2023 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Feb 5, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133638
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present application discloses a method and device for generating an Airy light needle with a long depth of focus and high aspect ratio. A linearly polarized light emitted from the laser passes through the collimated beam expanding system, and then is incident to the spatial light modulator loaded with a specific phase distribution for complex amplitude modulation. The first-order diffraction light passes through the iris and generates the modulated circular Airy beam at the back focal plane of the first 2-f lens system. The modulated circular Airy beam is focused to generate the Airy light needle with long depth of focus and high aspect ratio, which can be accurately controlled by controlling the parameters of the modulated circular Airy beams. The Airy light needle with adjustable depth of focus and aspect ratio can be applied to optical manipulation and optical imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.