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Method of differentiating particles based upon a dynamically changing threshold

  • US 5,268,966 A
  • Filed: 10/01/1991
  • Issued: 12/07/1993
  • Est. Priority Date: 08/10/1989
  • Status: Expired due to Term
First Claim
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1. A method of identifying a plurality of different types of unknown particles in a field of view, comprising the steps of:

  • a) measuring a first parameter for each of said plurality of different types of unknown particles;

    b) identifying one of said plurality of different types of unknown particles based upon the first parameter measured to produce a one type known particle;

    c) measuring a second parameter different from said first parameter, for each of said plurality of different types of unknown particles;

    d) measuring the second parameter for said one type known particle;

    e) identifying another type of particle from said plurality of different types of unknown particles in said field of view based upon the second parameter measured for said one type known particle.

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