Wavelength shifting filter
US5736744A · kind A · utility
14Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Mar 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wavelength shifting filter having two sheets of material adjacent and parallel with a spacer therebetween about the periphery of the sheets. The sheets are held in a frame. A phosphor coating is located on the inner side of one of the sheets. A transilluminator is associated with the filter and provides radiation in the UV wavelength. One sheet of the filter transmits the UV wavelength. The other sheet transmits at least a portion of the wavelength that the phosphor coating generates when subjected to the UV radiation of the transilluminator. The visual effect of white light is enhanced by the use of white glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.