Lens element and illumination optical apparatus and projection display apparatus
US6464375B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1999 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide an illumination optical apparatus comprising a plurality of illuminants, first condensing means for condensing the lights emitted from the illuminants, light synthesizing means for synthesizing the lights condensed by the first condensing means and emitting the synthesizing light in a predetermined direction, second condensing means into which the light emitted from the light synthesizing means comes to emit substantially parallel light, a first lens array constituted with a plurality of lenses to divide the light supplied from the second condensing means into a plurality of luminous fluxes, and a second lens array constituted with a plurality of lenses and into which the light supplied from the first lens array comes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.