Optical element, optical light source unit and optical display device equipped with the optical light source unit
US6798469B2 · kind B2 · utility
59Cited by
4References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2001 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Jun 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/343
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element comprises a fluorescence luminous element that emits fluorescent light when excited and a cholesteric filter disposed at the incident side of the fluorescence luminous element at which excitation light enters the fluorescence luminous element. The cholesteric filter comprises a cholesteric layer operative to transmit the excitation light and to reflect backward scattered fluorescent light traveling thereto so as to be integrated with fluorescent light directly coming out of the cholesteric filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.