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METHODS AND APPARATUS FOR DETERMINING CHARACTERISTICS OF PARTICLES

  • US 20070242269A1
  • Filed: 10/04/2006
  • Published: 10/18/2007
  • Est. Priority Date: 03/06/2004
  • Status: Abandoned Application
First Claim
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1. A method of determining characteristics of particles in a particle sample, comprising:

  • providing a sample chamber, providing a laser light source that produces a beam of laser light, passing said particle sample through said sample chamber, focusing said beam of laser light to a specific point in said sample chamber, wherein said beam of laser light is diffracted by at least one particle passing through said specific point, therein causing diffracted light to emanate from said specific point, providing at least one detector array that converts light into corresponding electronic signals, providing at least one lens that is focused at said specific point in said sample chamber, wherein said at least one lens directs at least some of said diffracted light onto said at least one detector array, determining a characteristic of said at least one particle that caused said diffracted light by analyzing said electronic signals generated by said at least one detector array, wherein the passing step includes the step of preventing particles from reaching the beam except in a vicinity of a focal point of the beam.

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