EAG Laboratories offers a full portfolio of particle size measurement techniques, covering a range of more than six orders of magnitude. Laser diffractometry is an analytical technique to determine the particle size distribution of powders and suspensions in the 0.02 µm – 2000 µm range. Typical applications include: raw materials for glass production, materials for 3D-printing, phosphors and inks.
A suspension is pumped through a measuring cell and is subsequently illuminated by a laser beam. When particles of different sizes pass a laser beam, they cause the laser light to be scattered at angles that are inversely proportional to the particle size. The angular scattering intensity data is analyzed to calculate the size of the particles, using the Mie scattering or Fraunhofer diffraction theory.
Laser Diffractometry measuring principle is pictured below.
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