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Microparticles measuring apparatus

  • US 8,213,009 B2
  • Filed: 05/14/2010
  • Issued: 07/03/2012
  • Est. Priority Date: 05/21/2009
  • Status: Active Grant
First Claim
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1. A microparticles measuring apparatus comprising:

  • optical detecting means for;

    (a) directing a laser beam toward microparticles passing through a flow channel,(b) detecting light emanating from the microparticles, and(c) converting the detected light into electrical signals; and

    controlling means for;

    (a) calculating a speed of the microparticles passing through the flow channel according to the electrical signals based on the speed being inversely proportional to pulse widths of said electrical signals,(b) determining if the calculated speed exceeds a prescribed limit or is lower than the prescribed limit; and

    (c) when the calculated speed exceeds the prescribed limit or is lower than the prescribed limit, suspending the supply of solution containing the microparticles.

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