Lamp having multi-colored radiant output
US6331750A · kind A · utility
Inventor
Key dates
| Filing date | Sep 16, 1999 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Sep 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source device is provided for separating light into several light components with a plurality of colors or hues which includes a source of white light and at least one dichroic filter carried on an envelope of the light source device. The filter selects a particular wavelength band from a visible light spectrum and transmits only light from the selected wavelength band therethrough. The filter includes a mirror for reflecting light having a wavelength band other than the selected wavelength band whereby all transmitted light exits the device in different combinations of colors or hues. Several filters and mirrors may be arranged adjacent to each other with respect to the light source and the apparatus therefore transmits ideally 100% of the light from the light source and no additional means are required for dissipating or absorbing the non-selected wavelength bands since all bands or rays are included in the multi-colored emission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.