Frustrated total internal reflection acoustic field sensor

Patent · Sat Jan 01 00:00:00 EST 2000

OSTI ID:872974

Kallman, Jeffrey S ^[1]

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1. Pleasanton, CA

A frustrated total internal reflection acoustic field sensor which allows the acquisition of the acoustic field over an entire plane, all at once. The sensor finds use in acoustic holography and acoustic diffraction tomography. For example, the sensor may be produced by a transparent plate with transparent support members tall enough to support one or more flexible membranes at an appropriate height for frustrated total internal reflection to occur. An acoustic wave causes the membrane to deflect away from its quiescent position and thus changes the amount of light that tunnels through the gap formed by the support members and into the membrane, and so changes the amount of light reflected by the membrane. The sensor(s) is illuminated by a uniform tight field, and the reflection from the sensor yields acoustic wave amplitude and phase information which can be picked up electronically or otherwise.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 6056696
• OSTI ID: 872974
• Country of Publication: United States
• Language: English

Related Subjects

frustrated
total
internal
reflection
acoustic
field
sensor
allows
acquisition
entire
plane
holography
diffraction
tomography
example
produced
transparent
plate
support
tall
flexible
membranes
appropriate
height
occur
wave
causes
membrane
deflect
quiescent
position
changes
amount
light
tunnels
gap
formed
reflected
illuminated
uniform
tight
yields
amplitude
phase
information
picked
electronically
otherwise
internal reflection
light reflected
acoustic wave
total internal
acoustic field
phase information
gap formed
flexible membrane
transparent plate
reflection acoustic
frustrated total
field sensor
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