抄録
A method for estimating the optimum refractive index input value was established to decrease the scattering of the measured results that come with different equipment using the laser diffraction and scattering method.
The effect of the imaginary part of the refractive index input value in this estimation method was discussed with copper as the absorbing material and polystyrene, alumina as the non-absorbing material, respectively. For the copper powders which have a large value in the imaginary part, the scattering of the results was decreased with the optimum refractive index input value which is obtained when considering both the real and imaginary parts in this estimation method. For polystyrene and alumina powders which have a small value in their imaginary part, the optimum refractive index input value was obtained when the imaginary part was 0.
On the other hand, the estimation method consists of some problems when measuring a bimodal sample. The validity of this estimation method was discussed for the bimodal sample of mono dispersed silica.
