In the beam limiter, the LED x ray collimator plays an important role. It can simulate the X-ray, simulate the light beam, adjust the closure degree of the lead leaf, adjust the position of the beam limiter, and determine the The dose of X-rays emitted and the location of the illumination cause the LED x ray collimator to function in advance. Because X-rays have radiation, the greater the dose, the greater the damage, so it can’t be sprayed freely on the human body. The LED x ray collimator simulates the X-ray for positioning adjustment, and also protects the irradiated person. The beam limiter lamp is a halogen lamp and an LED lamp. The halogen lamp is an early lamp used for the beam limiter, and has been slowly replaced by an LED lamp, which has been widely used.