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PHOTOACOUSTIC SPECTROSCOPY DETECTOR AND SYSTEM

  • US 20090229345A1
  • Filed: 02/22/2006
  • Published: 09/17/2009
  • Est. Priority Date: 03/04/2005
  • Status: Abandoned Application
First Claim
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1. An acoustic detector (10), for detecting acoustic signals generated in a photoacoustic spectroscopy system (1) through absorption of light by a fluid, comprising a sensing unit (11), said sensing unit (11) exhibiting structural resonance at or near a frequency of the acoustic signals,characterized in that the sensing unit (11) forms at least part of a cavity resonator, which is arranged to enable a formation of standing pressure waves inside said cavity resonator at a cavity resonance frequency substantially coinciding with a structural resonance frequency of the sensing unit (11).

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