Why stereoscopic glasses are one blue and one red

Red and blue stereoscopic glasses are only the lowest cost and worst effect of stereoscopic glasses, as well as other types such as polarized light and liquid crystal.

The principle of all stereoscopic glasses is to see different pictures with the left and right eyes, and use the visual difference to synthesize a three-dimensional picture in the brain. The corresponding film sources and ** equipment of various different types of stereoscopic glasses are different:

Red and blue only need to cost a few cents of glasses and ordinary equipment, the movie is two overlapping pictures with a red and a blue color, because red and blue are complementary colors, and the blue picture will be filtered out through the red lens, and the blue lens will filter out the red picture, so that the different pictures of the left and right eyes can achieve a three-dimensional effect, the cost is very low but the relative effect is poor, especially in the color can not reflect the true color of things.

The relative cost of polarized stereo is much higher, the glasses are a pair of polarized glasses with different angles of the left and right eyes, the cost is about 20, ** two fully synchronized projectors are required, and the projector should add a polarizing filter, the angle of the two polarizing filters corresponds to the left and right eyes of the glasses respectively. The characteristic of polarization is that the light with the same angle can pass, and the light with different angles will be filtered out, two polarized projection equipment with different angles plus glasses to achieve a three-dimensional effect for the left and right eyes to see different pictures, the recent new stereoscopic movies are basically using this method, compared to red and blue, there is no color problem, the effect will be much better, but limited to the cost of equipment is too high, it is very difficult to achieve at home.

The last kind of LCD glasses is only used on the computer for the time being, the glasses turn the left and right lenses black in turn at a very high frequency, and the picture is synchronized with the frequency of the glasses to display the picture of the left or right eye, so that the left and right eyes can see different pictures, but the disadvantage is very obvious, that is, the picture has been flickering, so the flickering frequency is required to be very high (above 120Hz) to not feel the flicker, but now the general LCD frequency is only 60, and you must buy a special display to achieve the effect. And this stereoscopic effect is only supported by some games for the time being, and movies can't find such a source.

There are other colors red-blue, red-green, blue-brown,

Different 3D sources require different lenses. Red and blue are the most.

12 red, 24 red, 36 blue, 48 blue? Half red and half blue? 10 Blue 20 Blue 30 Red 40 Red Got it?

Originally, the reflection should have been 7 colors. However, other colors are relatively light and easy to cover.

Probably so