Application of laser in particle size analyzer

Laser particle size analyzer is a new type of particle measuring instrument. After measuring the diffraction spectrum of particle groups, the particle distribution is analyzed by computer processing. It combines laser technology, optoelectronic technology, precision machinery and computer technology. It has the characteristics of fast response speed, wide test range and good repeatability. It can be used to measure the particle size distribution of various solid particles, mist droplets, bubbles and any two-phase suspended particulate matter, and to measure the particle size distribution of moving particle groups. Chemical restrictions.

Fundamental
Laser particle size analyzers measure particle size distribution based on the physical phenomenon that particles can scatter laser light. Because the laser has good monochromaticity and strong directionality, a parallel laser beam will irradiate to an infinite distance in an unobstructed infinite space, and there is little divergence during the propagation process.

When the light beam encounters a particle in the process of advancing, a scattering phenomenon will occur. The scattered light forms an angle θ with the initial propagation direction of the beam. The size of the scattering angle is related to the particle size of the particle. the smaller; the smaller the particle, the larger the angle theta of the resulting scattered light. In this way, the particle size distribution of the sample can be obtained by measuring the intensity of scattered light at different angles.

As a particle size testing instrument with excellent performance and wide application, laser particle size analyzer has been widely used in other powder processing and application fields.

internal structure
The classic optical route of the laser particle size analyzer consists of three parts: emission, reception and measurement window. The emission part is composed of a light source and a beam processing device, mainly providing monochromatic parallel light as illumination light for the instrument. The receiver is the key to the optical structure of the instrument. The measurement window is mainly to let the sample to be tested pass through the measurement area in a completely dispersed suspension state, so that the instrument can obtain the particle size information of the sample.