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Title: Lensing duct

A lensing duct to condense (intensify) light using a combination of front surface lensing and reflective waveguiding. The duct tapers down from a wide input side to a narrow output side, with the input side being lens-shaped and coated with an antireflective coating for more efficient transmission into the duct. The four side surfaces are uncoated, preventing light from escaping by total internal reflection as it travels along the duct (reflective waveguiding). The duct has various applications for intensifying light, such as in the coupling of diode array pump light to solid state lasing materials, and can be fabricated from inexpensive glass and plastic.
Inventors:
 [1]
  1. (Livermore, CA), Benett
Issue Date:
OSTI Identifier:
869269
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
Patent Number(s):
US 5307430
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:
lensing; duct; condense; intensify; light; combination; front; surface; reflective; waveguiding; tapers; wide; input; narrow; output; lens-shaped; coated; antireflective; coating; efficient; transmission; surfaces; uncoated; preventing; escaping; total; internal; reflection; travels; various; applications; intensifying; coupling; diode; array; pump; solid; lasing; materials; fabricated; inexpensive; glass; plastic; antireflective coating; reflective coating; internal reflection; pump light; diode array; front surface; total internal; various applications; reflective waveguiding; lensing duct; narrow output; wide input; duct tapers; /385/359/372/