Apparatus for measuring particle dimensions in fluids

Details Apparatus for measuring particle dimensions in fluids Apparatus for measuring particle dimensions in fluids

1998-06-02

1999-05-04

Kim, Robert H.

Optics: measuring and testing

For size of particles

By particle light scattering

356335, 356337, 356338, 356342, G01N 1502, G01N 2100

Patent

active

059009330

ABSTRACT:
Apparatus for analysing particle dimensions of particles contained in a fluid with an illuminating device for illuminating the particles to be analysed, incorporates a source for generating light. An optical system is disposed between the source and the fluid with a fluid-side window transparent to the light, which focusses the light on the opposite side of the window in the fluid and displaces the focal point along a path running around a center line of the apparatus. A detector device detects the light scattered by the particles and generates an electric signal dependent on the scattered light. A housing is provided between the fluid and the illuminating device and/or the detector device, with an analysis unit for determining the size and/or the size distribution of the particles. A device for setting the distance between the focal point and the window can be dispensed with if the optical system incorporates at least one stationary interface relative to the housing when it is in operation, which is disposed non-rotationally symmetrical in relation to the center line of the apparatus.

REFERENCES:
patent: 3858851 (1975-01-01), Ogle
patent: 5266798 (1993-11-01), Borden et al.
patent: 5748311 (1998-05-01), Hamann et al.

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