Light scattering-type sensors have been utilized in order to measure the amount of particulate matter in the atmosphere in variety of locations. Optically detection characteristics of a light scattering-type particle sensor with a double-side mirror reflector structure which can detect efficiently the weakly scattered light intensity from a particle are studied in simulation. Dependence properties of an irradiated laser power, a particle size and a spatial particle distribution are revealed by the simulation with regard to a minimum particle size of 0.3 μm in diameter. The calculated results with the simulation model corresponds reasonably well with the measured results.
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