| 摘要 |
PROBLEM TO BE SOLVED: To provide a detect inspection method and device for a glass container that can detect a defect with high precision in whatever direction a wrinkle is.SOLUTION: A pair of light control films which have louvers for limiting diffusion of light arranged in parallel while the louvers are orthogonal to each other are arranged between a surface light source and a glass container. It is determined whether there is a defect, on the basis of an image obtained by picking up light emitted from the surface light source and transmitted through the light control film pair and the glass container. The light of the light source is made substantially parallel through the light control film pair and the defect can be detected with high precision in whatever direction the defect such as a wrinkle is. |
