An imaging system used for material discrimination of an objet is provided. The imaging system including an x-ray source and an imaging sensor. The x-ray source generates multienergy polychromatic x-ray, wherein there is an integral-multiple relation between the multi-energy-band of the x-ray. The object is placed between the x-ray source and the imaging sensor. The x-ray is transmitted toward and imaged by the imaging sensor through the object. An imaging multi-energy-band of the imaging sensor corresponds to the multi-energy-band of the x-ray.一種成像系統,適於對待測物辨識其材料組成。成像系統包括X射線源以及感測器。X射線源係可產生具有多能帶的多波長X射線,其中X射線的多個能帶彼此間存在整數倍關係。待測物適於配置在X射線源與感測器之間。其中X射線經由照射待測物而傳送並被感測器所感測,且感測器的多個感測能帶對應於X射線的多個能帶。100‧‧‧成像系統110‧‧‧第一光柵120‧‧‧第二光柵130‧‧‧X射線源140‧‧‧感測器200‧‧‧待測物f2‧‧‧距離x1‧‧‧X射線
