Laser emitting apparatus using a basic hologram and a focusing hologram
US8941903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2013 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jun 14, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/32
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser processing apparatus including a laser light source, a phase modulation type spatial light modulator, a driving unit, a control unit, and an imaging optical system. A storage unit that is included in the driving unit stores a plurality of basic holograms corresponding to a plurality of basic processing patterns and a focusing hologram corresponding to a Fresnel lens pattern. The control unit arranges in parallel two or more basic holograms selected from the plurality of basic holograms stored in the storage unit, overlaps the focusing hologram with each of the basic holograms arranged in parallel to form the whole hologram, and presents the formed whole hologram to the spatial light modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.