Lensing duct

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869269

Beach, Raymond J. ^[1]

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1. (Livermore, CA), Benett

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5307430
• OSTI ID: 869269
• Country of Publication: United States
• Language: English

Related Subjects

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/