| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to inspect the mixing of a foreign body with the liquid in a transparent cylindrical container while discriminating the relation between proper lighting and a proper image pickup position and also discriminating between the foreign body and an air bubble. SOLUTION: Light sources 81 and 82 by the container 1 are switched to project illumination light having a specific diffusion angle on the liquid 2 in the container 1, and cameras 91, 92, 93, and 94 are arranged at positions having certain angles to a right-angled direction to the center of the luminous flux of the said illumination and pick up images of the liquid 2 in the container 1 from the container flank where the illumination light is neither made incident nor reflected. A foreign body candidate is detected by processing the images and the illumination light is switched to pick up images of the liquid 2 in the container from the said container flank; and an air bubble 7 is detected by processing the images and a foreign body candidate in an image at a position which does not correspond to the corresponding position of the air bubble 7 in the image is decided as a foreign body 6. |
