Frustrated total internal reflection acoustic field sensor

Details Frustrated total internal reflection acoustic field sensor Frustrated total internal reflection acoustic field sensor

1998-09-04

2000-05-02

Jaworski, Francis J.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

128915, 73656, A61B 800

Patent

active

060566965

ABSTRACT:
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.

REFERENCES:
patent: 3602577 (1971-08-01), Byram
patent: 4286468 (1981-09-01), Altman
patent: 5785663 (1998-07-01), Sarvazyan

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