Pressure Pulse Detection by Frustrated Internal Reflection

Abstract
The development of a membrane type pressure probe is reported in which the position of the membrane is recorded by frustrated internal reflection. The probe has a risetime of not more than 5 μsec, and records pulses of any length, as well as static pressure. It can have a static sensitivity of several volts per atm, and is relatively unaffected by electrical pickup noise. Examples for application are given, and the probe is compared with a piezo probe.

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