Laser machining device with a converged laser beam and laser machining method
US8324529B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2008 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Apr 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/32
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A laser machining device 1 includes a laser light source 10, a spatial light modulator 20, a controller 22, a converging optical system 30, and a shielding member 40. The phase-modulating spatial light modulator 20 inputs a laser beam outputted from the laser light source 10, displays a hologram modulating a phase of the laser beam at each of a plurality of pixels arranged two-dimensionally, and outputs the phase-modulated laser beam. The controller 22 causes the spatial light modulator 20 to display a plurality of holograms sequentially, lets the converging optical system 30 converge the laser beam outputted from the spatial light modulator 20 at converging positions having a fixed number of M, selectively places N converging positions out of the M converging positions into a machining region 91, and machines an object to be machined 90.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.