In the x ray collimator, the LED x ray collimator lamp 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 x ray collimator, and determine the The dose of X-rays emitted and the location of the illumination cause the LED x ray collimator lamp 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 beam limiter lamp simulates the X-ray for positioning adjustment, and also protects the irradiated person. The x ray collimator lamp is a halogen lamp and an LED lamp. The halogen lamp is an early lamp used for the x ray collimator， and has been slowly replaced by an LED lamp, which has been widely used.