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Pulse edge measurement for determining particle dimensional characteristics

  • US 4,263,508 A
  • Filed: 04/20/1979
  • Issued: 04/21/1981
  • Est. Priority Date: 04/20/1979
  • Status: Expired due to Term
First Claim
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1. An analyzer adapted for connection to an output of a device of the type which conveys a particle through a beam of electromagnetic radiation and which responds to radiation resulting from interaction of the particle with the beam to output a resultant signal in the form of a pulse as the particle enters and passes through the beam, said analyzer serving to determine a dimensional attribute of the particle and comprising:

  • means for measuring pulse edge width between two threshold values on at least one edge of the pulse as an indication of the particle attribute.

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