| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus, for the measurement of a particle size distribution, wherein it is not required for a measuring operator to set the refractive index or the like of a powder sample and the particle size distribution can be measured automatically and with high accuracy. SOLUTION: The method and the apparatus are provided with a procedure wherein the sample in a measuring region 4 is irradiated with irradiation light from a light source 2 capable of generating the irradiation light at a plurality of different kinds of wavelengths, a procedure wherein an intensity distribution corresponding to the scattering angle of scattered light obtained when the irradiation light is diffracted and scattered by the sample is measured regarding the irradiation light at the plurality of kinds of wavelengths and a procedure wherein the value of a prescribed computing constant is supposed, the particle size distribution corresponding to the plurality of kinds of wavelengths is computed on the basis of the intensity distribution of the scattered light due to the irradiation light at the wavelengths, the agreement property of the particle size distribution corresponding to the wavelengths is evaluated, the value of the computing constant is changed and the value of the computing constant is decided.
|
