| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an inspection method of a container bottom part in which inspection omission is suppressed.SOLUTION: An inspection method of a container bottom part includes an illuminating step of illuminating the curved side face part 101c of the bottom part 101 from obliquely above with respect to the bottom part 101 of a bottle 100, and an imaging step of photographing the bottom part 101 from the axial line AX direction of the bottle 100, where in the imaging step, illumination light having entered the curved side face part 101c of the bottom part 101 and had a light path changed by bottom cracks 103 generated in the bottom part 101 is photographed with a camera 3 having an imaging angle capable of photographing the illumination light.</p> |
