Why are the colors of 3D glasses different on both sides?

The imaging of 3D glasses is to simulate the different perspectives of the left and right eyes of the human eye and synthesize a stereoscopic image in the mind.

Color separation is what you call red, blue (or red, green) 3D glasses, and the more advanced technology is Dolby color separation 3D glasses. Through the left eye and the right eye

Left and right images seen by left and right eyes specially made with different color wheels;

Beam-splitting glasses, that is, 3D polarized glasses, achieve the effect of separating the left and right eye images through the different polarization angles of the left and right eyes;

Time-sharing glasses, that is, 3D electronic shutter glasses, achieve the effect of separating left and right eye images by alternately switching left and right eyes.