Camera system

A camera system comprising:

• an illumination unit configured to irradiate an inspection target, guided to move in a first direction, with a terahertz wave;
• and
• a camera unit disposed at a position which the terahertz wave reflected on the inspection target enters, and configured to acquire an image formed by the reflected terahertz wave,
• wherein the illumination unit includes a plurality of substrates arranged two-dimensionally along both the first direction, in which the inspection target moves, and a second direction different from the first direction, each of which drives at least one of a plurality of illumination elements,
• wherein the plurality of illumination elements arranged along the second direction have angles between the first direction and directions of the plurality of illumination elements to be smaller as positions of the plurality of illumination elements in the second direction approach a center portion of an arrangement area where the plurality of illumination elements are arranged, and
• wherein the directions of the plurality of illumination elements, which are arranged along the first direction and arranged at the same position in the second direction, are equal to each other.