Inspection device, packaging machine, and package inspection method

An inspection device that inspects a package comprising a first film made of an opaque material and a second film made of an opaque material attached to each other and a plurality of spaces each for placing a tablet between the first film and the second film, the inspection device comprising:

• an electromagnetic wave irradiator that irradiates, with a predetermined electromagnetic wave from a first film side, the package that is conveyed along a predetermined direction and that has the spaces at a plurality of positions in a width direction perpendicular to the predetermined direction;
• an imaging device that
• is disposed opposed to the electromagnetic wave irradiator across the package,
• comprises an electromagnetic wave detector comprising a plurality of detection elements that is arrayed along the width direction and that detects the electromagnetic wave radiated from the electromagnetic wave irradiator and transmitted through the package, and
• sequentially outputs an obtained electromagnetic wave transmission image every time the package is conveyed by a predetermined amount;
• and
• an image processing device that processes an image signal output from the imaging device, wherein
• the image processing device comprises:
• a processor that:
• converts a coordinate system of the electromagnetic wave transmission image obtained by the imaging device into a coordinate system of the package based on a positional relationship among the electromagnetic wave irradiator, the package, and the imaging device, and
• inspects the package based on the electromagnetic wave transmission image converted into the coordinate system of the package.