The principle of infrared night vision device is to amplify the electrons through the micro-channel plate, so it needs weak light. Strong light can convert and amplify more photons. At the moment of conversion, the current is too large (it should be current), which burns out the image intensifier and makes the infrared night vision device unusable. However, many excellent night vision devices have strong light protection. For example, the Sytong infrared night vision device has strong light protection. The concept of strong light protection is that under strong light, the night vision device will automatically turn off. achieve protection.