Illuminating apparatus
US6611382B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2001 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Aug 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0961
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser illuminating apparatus for irradiating a linear spatial light modulator comprises a bar laser having a plurality of linearly arranged emitters; a lens array having a plurality of lens units less in number than the emitters and arranged parallel to the direction of arrangement of the emitters, for causing a collimated laser beam incident on the lens units to converge at the final surface of the lens units at least on a plane including the direction of arrangement of the emitters and the optical axis; and optics for creating a superimposed far field pattern, in the direction of arrangement of the emitters, of the laser beams emitted from the bar laser onto the lens array, projecting the far field patterns divided by the lens array onto the illumination area in superimposition, and projecting near field patterns, in the direction perpendicular to the direction of arrangement of the emitters, of the laser beams emitted from the bar laser on the illumination area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.