Highly efficient UV C bulb with multifaceted filter
A Far UV C excimer bulb assembly including an excimer bulb, and a curved filter external to and separated from the excimer bulb. The curved filter being hafnium based and including an arc. The excimer bulb emits radiation in a plurality of wavelengths substantially comprising Far UV C. The curved filter having a cut-off wavelength of 234 nm and adapted to block substantially all wavelengths of UV C radiation longer than 234 nm. The excimer bulb is positioned at least partially and centered within the arc so that the majority of the Far UV C wavelengths of radiation pass perpendicularly through the curved filter. The assembly may further include a mirror which may also be curved, and plated onto the exterior surface of the excimer bulb.
1. A Far UV C excimer bulb assembly, comprising;
an excimer bulb which generates radiation in a plurality of wavelengths substantially comprising Far UV C;
a curved filter external to and separated from said excimer bulb, said curved filter including an arc;
said curved filter being hafnium based;
said curved filter having a cut-off wavelength of 234 nm and adapted to block substantially all wavelengths of UV C radiation longer than 234 nm;
said excimer bulb positioned at least partially and centered within said arc so that a majority of said Far-UV C wavelengths of radiation pass perpendicularly through said curved filter.
2. The Far UV C excimer bulb assembly of claim 1 wherein said curved filter is a cylinder surrounding said excimer bulb and said excimer bulb is positioned at the center of said cylinder.
3. The Far UV C excimer bulb assembly of claim 1 wherein said curved filter is a semi-cylinder.
4. The Far UV C excimer bulb assembly of claim 3 further includes a mirror external to said excimer bulb.
5. The Far UV C excimer bulb assembly of claim 4 wherein said mirror is curved.
6. The Far UV C excimer bulb assembly of claim 4 where said excimer bulb includes an exterior surface and said mirror is plated on said exterior surface of said excimer bulb.
7. The Far UV C excimer bulb assembly of claim 1 wherein substantially all Far UV C wavelengths of radiation shorter than 234 nm pass through said curved filter.
8. The Far UV C excimer bulb assembly of claim 1 wherein at least one Far UV C wavelength of radiation shorter than 234 nm passes through said curved filter.
9. The Far UV C excimer bulb assembly of claim 1 wherein said excimer bulb has a translucent face.
10. The Far UV C excimer bulb assembly of claim 2 wherein said cylinder is formed by a plurality of flat filters.