| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a granule inspection device having the configuration of an illumination system and a light-receiving system capable of obtaining an appropriate light detection result is desired.SOLUTION: The granule inspection device comprises: a first light-receiving unit 6A in which optical collimation is adjusted to a first inspection area TA1 defined in a granule passage route; a first front illumination unit 4A for illuminating the first inspection area TA1 while backing on the first light-receiving unit 6A; a first rear illumination unit 5A for illuminating the first inspection area while facing the first light-receiving unit 6A; a second light-receiving unit 6B in which optical collimation is adjusted to a second inspection area TA2, with a space from the first inspection area TA1, from a side of the passage route opposite the first light-receiving unit; a second front illumination unit 4B for illuminating the second inspection area TA2 while backing on the second light-receiving unit 6B; and a second rear illumination unit 5B for illuminating the second inspection area TA2 while facing the second light-receiving unit 6B. |
