Laser Diffraction Particle Size Analyzer Working Principle
Fundamental Principles Of Laser Diffraction Particle Size Distribution Fundamental Light Scattering
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Every analyzer from the very first commercial prototype to the state of the art la 960 utilizes this principle.
Laser diffraction particle size analyzer working principle. Large particles scatter light at small angles relative to the laser beam and small particles scatter light at large angles as illustrated below. Laser diffraction has emerged as one of the most important and effective techniques in the world of particle size analysis thanks to its fast non destructive properties its suitability for a broad range of particle sizes and its ability to be fully automated. As a technique that measures particle size distribution for both wet and dry dispersions it offers many advantages including a high level of precision fast response. 80 photodetectors covering an approximate angular range of 0 170 degrees.
Laser diffraction measures particle size distributions by measuring the angular variation in intensity of light scattered as a laser beam passes through a dispersed particulate sample. At its very most basic laser diffraction is about the relationship between particle size and the angle and intensity of scattered light. A typical laser diffraction optical system will include. It works on the principle that when a beam of light a laser is scattered by a group of particles the angle of light scattering is inversely proportional to particle size ie.
Hundreds of refinements to the basic design have been included to improve performance and usability. Laser diffraction has become one of the most commonly used particle sizing methods especially for particles in the range of 0 5 to 1000 microns. The smaller the particle size the larger the angle of light scattering. The ls 13 320 series is the most versatile and sophisticated laser diffraction particle sizing analyzer available today.
Laser diffraction analysis also known as laser diffraction spectroscopy is a technology that utilizes diffraction patterns of a laser beam passed through any object ranging from nanometers to millimeters in size to quickly measure geometrical dimensions of a particle. The la 960 particle size analyzer represents the tenth generation laser diffraction instrument designed by horiba. The ls 13 320 offers the highest resolution reproducibility and unsurpassed accuracy. A guide to understanding laser diffraction principles theory.
The principle of laser diffraction is the relationship that exists between light scattering its angle and intensity and particle size. Particle sizing by laser diffraction. Very high quality lenses mirrors and glass measurement cell. Light scatters more intensely and at smaller angles off of large particles than small particles.
The larger the particle the smaller the angle and the higher the intensity of the scattering.
