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Response of a Laser Optical Particle Counter to Transparent and Light-Absorbing Particles 激光光学粒子计数器对透明和吸光粒子的响应
研究了前向散射激光光学粒子计数器的响应与粒子大小、形状和折射率的关系。采用静电分级和振动孔法产生的邻苯二甲酸二辛酯(DOP)、氯化钠和炭黑的单分散气溶胶以及PSL颗粒。将计算结果与理论计算和光散射计算结果进行了比较,结果与理论结果吻合良好。对于PSL和DOP的透明球形粒子,由于共振,仪器响应曲线显示出振荡特征。涉及单色光的光散射效应。对于NaCl的非球形粒子,振荡特征不太明显。对于炭黑和亚甲基蓝的吸光颗粒,仪器输出是颗粒大小的平滑单调函数。还研究了光学和电子符合引起的粒子数损失。 实验结果与理论预测一致。单位:SICitation:ASHRAE Transactions,1986年,第92卷,pt。1A,旧金山
The response of a forward-scattering, laser optical` particle counter has been studied as a function of particle size, shape, and refractive index. Monodisperse aerosols of di-octyle phthalate (DOP), NaCl, and carbon black generated by the electrostatic-classification and vibrating-orifice methods and PSL particles were used. The results have been compared with theoretical, light scattering calculations and found to be in good agreement with the theoretical results.For the transparent, spherical particles of PSL and DOP, the instrument response curve shows an oscillatory character due to resonant. effects in light scattering involving monochromatic light. For the nonspherical particles of NaCl the oscillatory character is less pronounced. For the light absorbing particles of carbon black and methylene blue, the instrument output is a smooth, monotonic function of particle size.The loss of particle count by optical and electronic coincidence has also been studied. The experimental results are in good agreement with theoretical predictions.Units: SI
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