What is the principle of polarized light camera?

Light is energy transmitted in the form of waves with transverse amplitude. When light passes through a gap smaller than its amplitude, the vibration direction is in phase with the gap, so it can continue to transmit energy, and the light with an angle of 90 degrees (most obviously) will be reflected back. It is by using this principle that the polarizer is made into a diaphragm with many small gaps in the same direction, so that the light waves attached to the gaps of the polarizer are reflected back and cannot enter the camera.

Because the direction of light entering the camera is very consistent, you will get a picture with bright colors and clear wheels, but you can't use it when the light is insufficient! !