Package inspection system

A package inspection system comprising:

• a conveyor mechanism for conveying a package having a content in a wrapping whose outline can be visually recognized;
• a radiation part for irradiating the moving package with an X ray or a terahertz wave;
• an electromagnetic-wave detection part for detecting the X ray or terahertz wave transmitted through the package, the electromagnetic-wave detection part being configured to acquire a first image data defining an outline of the content of the package;
• an illumination part for illuminating the moving package with light, wherein the content within the wrapping cannot be seen through optically;
• an optical detection part for detecting the light having passed the package, the optical detection part being configured to acquire a second image data defining an outline of the wrapping of the package;
• and
• a controller configured to determine positional relationship between the wrapping and the content based on the first image data and the second image data,
• the radiation part and the electromagnetic-wave detection part being placed at opposite sides of the conveyor mechanism, the illumination part and the optical detection part being placed at opposite sides of the conveyor mechanism, and the conveyor mechanism having a gap through which the electromagnetic-wave detection part and optical detection part are allowed to acquire the first image data and the second image data, respectively.