04540283 is referenced by 37 patents and cites 2 patents.

An apparatus and method for determining the size and velocity of particles, droplets, bubbles, or the like employing laser light scattering is disclosed. A laser generation means is provided for generating a pair of coherent laser beams. These beams are directed along an axis and are caused to cross the axis at an angle to establish a sample volume. A collection means for sensing the scattering caused by particles, droplets, bubbles or the like within the sample volume is provided. The collected scattered signals are directed onto photo-detectors which are coupled to a signal phase determining means for determining the phase of the scattered signals as the particle, droplet, bubble or the like passes through the sample volume. Sizing means are coupled to the signal phase determining means for determining the size of the particle, droplet, bubble or the like from phase changes and the scattered signal. The velocity of the particle, droplet, bubble or the like is determined using well known laser Doppler anemometry techniques. In addition, the present invention discloses a method to determine the direction of motion of a particle, droplet, bubble or the like passing through the sample volume.

Title
Apparatus and method for determining the size and velocity of particles, droplets, bubbles or the like using laser light scattering
Application Number
6/506108
Publication Number
4540283
Application Date
June 20, 1983
Publication Date
September 10, 1985
Inventor
William D Bachalo
14660 Saltamontes Way, Los Altos Hills, 94022
CA, US
Agent
Jeffrey J Blatt
IPC
G01N 15/02
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