US 11,925,720 B2
Highly efficient UV C bulb with multifaceted filter
Kevin C. Baxter, Tulsa, OK (US); and Min Shi, Shanghai (CN)
Assigned to Lumenlabs LLC, Poway, CA (US)
Filed by LUMENLABS LLC, Poway, CA (US)
Filed on Jul. 28, 2023, as Appl. No. 18/227,514.
Application 18/227,514 is a continuation of application No. 17/160,230, filed on Jan. 27, 2021, granted, now 11,752,228.
Prior Publication US 2023/0381359 A1, Nov. 30, 2023
Int. Cl. F21V 7/06 (2006.01); A61L 2/10 (2006.01); A61L 2/24 (2006.01); F21V 9/06 (2018.01); G01C 3/00 (2006.01); G01J 1/42 (2006.01); H01J 61/35 (2006.01); H01J 63/00 (2006.01); F21Y 115/10 (2016.01)
CPC A61L 2/24 (2013.01) [A61L 2/10 (2013.01); F21V 7/06 (2013.01); F21V 9/06 (2013.01); G01C 3/00 (2013.01); G01J 1/42 (2013.01); H01J 61/35 (2013.01); H01J 63/00 (2013.01); A61L 2202/11 (2013.01); A61L 2202/14 (2013.01); A61L 2202/25 (2013.01); F21Y 2115/10 (2016.08)] 10 Claims
OG exemplary drawing
 
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.