| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a foreign matter inspection device capable of detecting foreign matter in a liquid which is sealed in a container separately from air bubbles included in the liquid.SOLUTION: The foreign matter inspection device comprises: an image-capturing device for obtaining an inspection image by capturing the image of a container from a lateral position of a conveyance mechanism for transporting the container placed therein; a parallel surface light source provided at a position opposed to the image-capturing device and evenly transmission-illuminating the whole of the container placed in the conveyance mechanism; and a high-luminance illumination light source for causing total reflection and scattered reflection due to air bubbles included in a liquid sealed in the container to occur by illuminating the container with high luminance from a position above the conveyance mechanism. The foreign matter inspection device thereby obtains, from the image-capturing device, a high-resolution monochrome image in which the air bubbles included in the liquid constitute a white region due to the total reflection and scattered reflection of the high-luminance illumination light and foreign matter included in the liquid constitutes a black shade region due to the parallel surface light source for transmission-illumination.</p> |
