Optical filter for CIE daylight simulator
US7378784B1 · kind B1 · utility
2Cited by
7References
16Claims
0Family size
Inventor
Key dates
| Filing date | May 13, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Apr 12, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical filter used for modifying the spectral power distribution of high color temperature lamp to simulate CIE standard daylight illuminant. The optical filter comprising a heat-absorbing glass plate, a heat insulation washer, a longpass glass plate, and one or more spectral modification glass plate in series. The longpass glass plate and the heat absorbing glass plate determine the wavelength range, and the spectral modification glass plate(s) modify the spectral power distribution of the high color temperature halogen lamp. The CIE daylight simulators with the optical filter have very high colorimetric indexes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.