Device, system and method for making collimator

The invention provides a device for making a collimator. The device comprises a bottom plate, and a cylindrical positioning column and a plate-like positioning plate which are arranged on the same surface of the bottom plate. The invention further relates to a system for making a collimator, comprising the device for making a collimator and multiple collimation sheets. The invention further relates to a method for making a collimator by use of the system for making a collimator. Collimation sheets involved in the method comprise a plurality of wave grid structures and a plurality of matching positioning structures, and the positioning structures cooperate with the corresponding positioning column and the positioning plate to carry out positioning to make the collimation sheets stacked one atop the other until a collimator of a predetermined size is obtained. The device for making a collimator accurately positions of the collimation sheets to make the wave grid structures on the collimation sheets accurately aligned. Through the method for making a collimator, a collimator is easy to make, and the quality of the made collimator is improved.