入射光束宽度对光透沉降法测量的分辨力影响研究

Research of resolution effect for the width of incidence beam in the measurement of photosedimention technique

介绍了入射光束的宽度对仪器分辨力的影响,由于该宽度的存在使在用光透沉降法测量时很难清楚地分辨该宽度内存在的多种颗粒,降低了仪器的分辨力,对测量结果带来很大的误差。参照光散射模型,建立RRB分布的理想颗粒模型,并以此为基础对宽度降低仪器分辨力的问题进行理论分析。现用Chahine算法反演并改进算法以提高分辨力。结果也表明,改进后Chahine算法的确有很高的稳定性,其反演效果也非常明显。

The effect of resolution produced by the incidence beam width was introduced.Because of the width of the incidence beam,the several size particles in the beam width can not be distinguished clearly in the measurement of photosedimention technique,and the resolution of the instrument was reduced,and then big errors were brought to the measurement.The ideal RRB distribution model was built consulted the model of the light scatter,and the problem that the resolution of the instrument was reduced by the beam width was analyzed theoretically based on the model.The chahine algorithm was used and improved to enhanced the resolution.The results show that the improved Chahine algorithm has the high stability and the inverse effect was very obvious.