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Title: Hollow lensing duct

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.
Inventors:
 [1];  [2];  [3];  [4];  [5];  [5];  [6];  [7]
  1. (Livermore, CA)
  2. (Sunol, CA)
  3. (Dublin, CA)
  4. (Tracy, CA)
  5. (Pleasanton, CA)
  6. (San Ramon, CA)
  7. (Castro Valley, CA)
Issue Date:
OSTI Identifier:
873446
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 6160934
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
hollow; lensing; duct; condense; intensify; light; combination; focusing; spherical; cylindrical; lens; followed; reflective; waveguiding; tapers; wide; input; narrow; output; consisting; coated; antireflective; coating; efficient; transmission; inside; surfaces; appropriately; preventing; escaping; reflection; travels; various; applications; intensifying; coupling; diode; array; pump; solid; lasing; materials; antireflective coating; reflective coating; pump light; cylindrical lens; inside surface; diode array; various applications; reflective waveguiding; lens duct; lensing duct; narrow output; wide input; hollow lensing; duct tapers; /385/372/