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Contaminant detection system

  • US 5,932,806 A
  • Filed: 05/09/1997
  • Issued: 08/03/1999
  • Est. Priority Date: 12/13/1994
  • Status: Expired due to Fees
First Claim
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1. A method of detecting contaminants on a skin exposed to the environment comprising the steps of:

  • transmitting a guided wave through the skin at a non-perpendicular incident angle with respect to the skin, wherein the wave travels at a substantially constant phase velocity corresponding to multiple resonances through the skin;

    receiving the wave transmitted through the skin and providing a received signal indicative thereof, wherein the received signal has a frequency signature; and

    extracting features from the frequency signature of said received signal for classifying contaminants on the skin.

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