The shell of newheek x ray collimator products is made of iron. The X-ray beam limiter with multi-function square field of view is used to make the beam limiter have a stable system. In order to ensure that X-ray can be emitted quantitatively from the beam limiter, the outer walls of the beam limiter are all made of double-lined lead material. newheek beam limiter products use six pairs of blades to control the X-ray field of view, all of which are lined with lead. Two pairs are at the entry of the ray, two pairs are in the middle, and the remaining two pairs are at the exit of the ray. The knob on the panel can control the blade. The calibration value of newheek beam limiter products on the panel allows the user to read out the size of the field of view based on this data and set it by himself with a knob.