Inspection device and PTP packaging machine

An inspection device for inspecting an inspection object portion, in a Press-Through-Pack (PTP) sheet comprising a pocket portion formed in a container film to house a content, and a cover film bonded to the container film to close the pocket portion, or in a portion of a PTP film that forms the PTP sheet,

• the inspection device comprising:
• an irradiator that irradiates the inspection object portion with light;
• an imaging device that takes an image of the inspection object portion irradiated with the light emitted from the irradiator;
• a processor that detects a defect in the inspection object portion from the image taken by the imaging device by using a predetermined luminance threshold value, and determines whether the inspection object portion is non-defective or defective;
• a verification image generating circuit that generates a verification image in which a virtual defective image is placed in a non-defective image determined as non-defective by the processor;
• and
• a threshold value verifier that causes the processor to determine whether the inspection object portion is non-defective or defective by using the verification image, in place of the image taken by the imaging device, and to verify the luminance threshold value based on a determination result by the processor, wherein
• the irradiator radiates lights of multiple different wavelength components,
• a luminance of the defective image is set independently according to the light of each of the wavelength components, with a luminance of a portion corresponding to the defective image in the non-defective image as a reference, the non-defective image being taken for each of the multiple different wavelength components, and
• the defective image includes:
• a dark defective image having a luminance set to be lower than the luminance of the portion corresponding to the defective image in the non-defective image;
• and
• a bright defective image having a luminance set to be higher than the luminance of the portion corresponding to the defective image in the non-defective image.

An inspection device for inspecting an inspection object portion, in a Press-Through-Pack (PTP) sheet comprising a pocket portion formed in a container film to house a content, and a cover film bonded to the container film to close the pocket portion, or in a portion of a PTP film that forms the PTP sheet,

• the inspection device comprising:
• an irradiator that irradiates the inspection object portion with light;
• an imaging device that takes an image of the inspection object portion irradiated with the light emitted from the irradiator;
• a processor that detects a defect in the inspection object portion from the image taken by the imaging device by using a predetermined luminance threshold value, and determines whether the inspection object portion is non-defective or defective;
• a verification image generating circuit that generates a verification image in which a virtual defective image is placed in a non-defective image determined as non-defective by the processor;
• and
• a threshold value verifier that causes the processor to determine whether the inspection object portion is non-defective or defective by using the verification image, in place of the image taken by the imaging device, and to verify the luminance threshold value based on a determination result by the processor, wherein
• the irradiator radiates lights of multiple different wavelength components,
• a luminance of the defective image is set independently according to the light of each of the wavelength components, with a luminance of a portion corresponding to the defective image in the non-defective image as a reference, the non-defective image being taken for each of the multiple different wavelength components, and
• the defective image has a luminance that is set to be lower than the luminance of the portion corresponding to the defective image in the non-defective image, and set to gradually increase outward from a center of the defective image.