应用范围

米氏计算模式 作为激光衍射法的计算模式只适用于符合一下两个条件的单一物质的圆形样品。

不透明颗粒	预期粒度分布： 90% 小于 2微米
透明颗粒	预期粒度分布:  90% 小于 200微米

米氏理论不适用于非球形颗粒或者不同物料相混合的样品，以及不知道具体折射系数的物质。

技术参数

sensors:	HELOS family	MYTOS family
measuring ranges:	all measuring ranges	all particle sizes
range of relative complex refractive index	refraction coefficient 0.1 <= n <= 5.0	absorption coefficient 0.0; 1E-5<= k <= 8.0
evaluation:	MIEE	Mie Extended Evaluation Mode

Background Information

The basis for applying the Mie theory is the publication by G. Mie[2] in 1908, in which an exact solution of Maxwell's equations was formulated for scattering of electromagnetic waves by spherical particles. This solution is known as the Mie theory. A detailed description is presented in [3].

For the application of Mie theory, the complex refractive index, n of the particles and the refractive index n_m of the (non-absorbing) fluid must be known.

The complex refractive indes ist defined by:	n = np - i * kp
The relative complex refractive index is defined by:	m =n/nm
where
np	the refractive index of the particle, describes reflection and refraction,
nm	the refractive index of the fluid,
kp	the absorption coefficien of the particle, describes the absorption,
i	the imaginary unity.