| 摘要 |
A particle size distribution measuring device detects, at a detecting portion, the spatial intensity distribution of diffracted light and scattered light produced by irradiating a sample including a group of particles, with laser light. The measuring device calculates the particle size distribution of the group of the particles using the detected results and has an irradiated area transfer device that allows an irradiated area of the laser light relative to the sample, to be displaced in at least one direction perpendicular to the direction the laser light advanced toward the sample (viz., either one-dimensionally or two-dimensionally), while the sample and detecting portion respectively remain fixed in stationary positions.
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