| 摘要 |
PROBLEM TO BE SOLVED: To provide a scattered light measuring device efficiently detecting only scattered light generated by fine particles and detecting even a trace of fine particles in high sensitivity. SOLUTION: This scattered light measuring device measures scattered light S generated by scattering irradiation light emitted from a light source device 2 with fine particles P inside a measuring target material M. A flood unit 5 containing a capillary plate is fit to the tip of a flood cable for guiding the irradiation light L emitted from the light source 2, and the capillary plate is also contained in a light receiving unit 8 receiving the scattered light S. The capillary plates have a plurality of fine holes arranged in parallel, made of a material having light absorbing properties, and the scattered light S passed through the capillary plates is detected with photomultiplier of a light detecting unit 3.
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