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Hollow lensing duct

United States Patent

December 12, 2000
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A hollow lensing duct to condense (intensify) light using a combination of focusing using a spherical or cylindrical lens followed by reflective waveguiding. The hollow duct tapers down from a wide input side to a narrow output side, with the input side consisting of a lens that may be coated with an antireflective coating for more efficient transmission into the duct. The inside surfaces of the hollow lens duct are appropriately coated to be reflective, preventing light from escaping by reflection as it travels along the duct (reflective waveguiding). The hollow duct has various applications for intensifying light, such as in the coupling of diode array pump light to solid state lasing materials.
Beach; Raymond J. (Livermore, CA), Honea; Eric C. (Sunol, CA), Bibeau; Camille (Dublin, CA), Mitchell; Scott (Tracy, CA), Lang; John (Pleasanton, CA), Maderas; Dennis (Pleasanton, CA), Speth; Joel (San Ramon, CA), Payne; Stephen A. (Castro Valley, CA)
The Regents of the University of California (Oakland, CA)
09/ 182,155
October 29, 1998
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.