Beam formation unit comprising two axicon lenses, and device comprising one such beam formation unit for introducing radiation energy into a workpiece consisting of a weakly-absorbent material
US7102118B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Aug 25, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/36
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a beam-shaping unit for generating a beam bundle which is focused in a punctiform manner, propagates in a ring shape, and has a radiationless central area, comprising a focusing lens, a first axicon and a second axicon, and to an arrangement with a beam-shaping unit of this kind for introducing radiation energy into a workpiece comprising weakly absorbent material which is arranged between a first resonator mirror and a second resonator mirror. The first resonator mirror which is arranged in front of the workpiece in the radiating direction is located in the radiationless central area. The radiation energy can be absorbed to the maximum extent by repeatedly passing through the same interaction volume in the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.