| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain size distribution measuring device capable of accurately catching grain properties of sample powder, controlling the dispersed state of the sample powder based on a result of this, and measuring qualities of the sample powder with higher accuracy. SOLUTION: In this grain size distribution measuring device 1, while sample powder is being supplied to a measuring place, laser light is radiated to the sample powder passing through the measuring place and the diffracted/scattered state of laser light is detected, and by arithmetically processing detection data by a computer, grain size distribution of the sample powder is measured. The grain size distribution measuring device 1 is integrally provided with a grain image photographing part 9 comprising a light source 10 and a CCD camera 11, image data obtained by the grain image photographing part 9 are arithmetically processed by the computer, and thereby grain properties including at least the aggregated state of grains of the sample powder are measured while the scattered state of the sample powder supplied to the measuring place is controlled based on a result of the measurement.
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