抄録
This paper proposes a method for the determination of optimum refractive index parameter in laser diffraction method.
The cosine of cross-angle θ between “detected light distribution vector” and “estimated light distribution vector” is used as an evaluation function to determine the optimum refractive index parameter as reported previously. Thus-deteremined refractive index parameter is found to be adopted as the optimum refractive index when the value of the cosine of cross-angle θ is close to unity.
In this paper, a weight matrix is used when the cosine of cross-angle θ is calculated. It is introduced because it can clearly discriminate the optimum refractive index parameter from others. The effectiveness of the weight matrix, as well as a modified Gaussian function, is confirmed through the experiments with several sample powders.
