Methods of laser diffraction measurement for nonspherical particles

Tongsheng Mou; Xinying Zhou

doi:10.1117/12.401731

3 October 2000 Methods of laser diffraction measurement for nonspherical particles

Tongsheng Mou, Xinying Zhou

Proceedings Volume 4220, Advanced Photonic Sensors: Technology and Applications; (2000) https://doi.org/10.1117/12.401731
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

The methods based on the laser diffraction are more noticeable in the measurement of particle size distribution. In present laser particle sizing system, particles are treated as a group of spheres with various diameters, in order to inverse the particle size distribution. Actually, the shapes of most measured particles are non-spherical, so obvious differences would occur in the assumption of sphere. In this paper, after the description of the principle of laser particle sizing, problems existing in using above methods to measure the non- spherical particles are discussed. Then it is presented that the measurements based on the spherical, linear, rectangular particle diffraction would be applied to inverse the particle size distribution, according to the shape of measured particles. Through the measurement of samples, it is indicated that the results measured are consistent with those by the auto-electron microscope. In additionally, the values and diagrams obtained by these methods are presented, and the errors with different diffraction models are discussed in this paper.

Citation Download Citation

Tongsheng Mou and Xinying Zhou "Methods of laser diffraction measurement for nonspherical particles", Proc. SPIE 4220, Advanced Photonic Sensors: Technology and Applications, (3 October 2000); https://doi.org/10.1117/12.401731

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