Method and device for precise counting and measuring the particulates and small bodies

CAFC
  • US 5,767,967 A
  • Filed: 01/02/1997
  • Issued: 06/16/1998
  • Est. Priority Date: 01/02/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for precise counting and measuring a particulates and small bodies illuminated by a light beam and including the steps, wherein:

  • detecting a scattered light by an ellipsoidal mirror system, comprising a first ellipsoidal mirror and a second ellipsoidal mirror, which is bigger than said first ellipsoidal mirror, wherein said first ellipsoidal mirror and said second ellipsoidal mirror are connected towards to each other by cross-section lateral areas of said first ellipsoidal mirror and said second ellipsoidal mirror, wherein said ellipsoidal mirror system is placed along a device axis, which concurs with the major axes of said first ellipsoidal mirror and said second ellipsoidal mirror, wherein a first focus of said first ellipsoidal mirror concurs on said device axis with a second focus of said second ellipsoidal mirror and a second focus of said first ellipsoidal mirror concurs on said device axis with a first focus of said second ellipsoidal mirror;

    detecting said scattered light which is occurred inside said first ellipsoidal mirror on said device axis by intersection of said light beam with a particulates and small bodies flow at a point of said second focus of said second ellipsoidal mirror, which belongs also to said first focus of said first ellipsoidal mirror;

    detecting said scattered light by a light detector or by a detection means, which is placed inside said second ellipsoidal mirror on said device axis at a point of said first focus of said second ellipsoidal mirror, which belongs also to said second focus of said first ellipsoidal mirror.

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