Do you know these factors that affect the accuracy of nano laser particle size meters?

The nano laser particle size meter adopts imported He-Ne laser light source, the laser power is more stable, and the warm-up time is further shortened
.

Combined with its modern intelligent measurement control analysis software and automatic injection measurement hardware system, the user experience has been improved, the particle size test process is more concise and efficient, the test results are more stable and reliable, and the interpretation and comparison of the particle size test report are more intuitive and simple
.

So what are the factors that affect the accuracy of the nano laser particle sizer? 1.
Built-in algorithm Due to the difference in light intensity distribution, the software built-in algorithm used by different particle size meters is different, resulting in differences in the calculation results of the coefficient matrix, which brings different degrees of error
to the inversion.

3, refractive index Mie scattering theory is a strict solution of Maxwell's electromagnetic equations, the premise of laser detection is that the powder particles are spherical and isotropic, and most crystals have different refractive indexes in different directions
.

Due to the number of light energy detectors in different devices, the spatial distribution position, and the difference in sensitivity will also lead to differences in
detection results.

4, polyreflective index Laser scattering method particle size measurement object is generally micron-level particles, the optical constant of these particles can not be simply regarded as the optical properties of the particle material, but refers to the particle polyrefringence n', which is defined as: n'=n+ik
.

Where n is the commonly referred to refractive index, the imaginary k represents the speed of strong decay of light propagating in the medium, that is, the absorption coefficient, sometimes referred to as the absorption rate
.

The choice of complex refractive index is appropriate or not directly affects the accuracy and reliability of the particle size detection results, but there are many factors affecting the complex refractive index of the particles to be measured, and it is difficult to determine its accurate value, so so far there is still no unified method
to determine the complex refractive index in the field of laser particle size measurement.

In the actual particle size detection process, it is generally only a fixed polyrefringence index for the same substance, and such a measurement result will inevitably deviate greatly from
the true value of the sample.

However, if you look for the polyrefringence of particles in different particle size intervals
, it is not realistic.