Choosing The Most Suitable Theory In Laser Diffraction Mie Or Fraunhofer?

By CILAS

Particle size analysis is based on the inversion of a diffusion matrix, the resolution of which is based on theories stemming from the equations of Maxwell. The Fraunhofer approximation and the Mie theory enable particle size distributions between several tens of nanometres and several thousands of micrometres to be calculated. The differences between these two models are explained in various ISO standards that serve as bases during particle size analyses.