Light irradiation device and light irradiation method irradiating converged light with an object
US8575514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2012 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Nov 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/32
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A light irradiation device and method for irradiating converged light with an object include a light source configured to output a light, a phase-modulating spatial light modulator, a controller, and a converging optical system. The phase-modulating spatial light modulator is configured to input the light outputted from the light source and to display a hologram modulating a phase of the light at each of a plurality of pixels arranged two-dimensionally, and outputs the phase-modulated light. The controller is configured to cause the spatial light modulator to display a hologram such that the light outputted from the spatial light modulator is converged at a plurality of converging positions. The controller causes the spatial light modulator to display a first hologram and performs a feedback of the first hologram so as to modify the first hologram. The modifying of the first hologram is performed by measuring intensity of the light converged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.