Do I have to wear 3D glasses to watch 3D movies?

You don't have to bring this. You can make a reasonable choice according to your actual situation. Under normal circumstances, 3D movies with professional 3D eyes will have a more perfect viewing experience. Wearing glasses can experience the pleasure of zero-distance interaction with the role, experience the pleasure and excitement of being there, and let yourself better integrate into the movie plot. However, if you feel uncomfortable wearing glasses, you can always take off your glasses and watch it as a 2D movie.

Relief: the superposition of two images produces a three-dimensional effect, and when the audience wears three-dimensional glasses, they feel immersive. Also known as "3D movies".

Stereoscopic film is a film that uses the difference of visual angle and convergence function of human eyes to produce stereoscopic effect. Appeared in 1922. When showing this film, two pictures are superimposed on the screen. Through the audience's special glasses or the radial semi-conical lens grating in front of the screen, the audience's left eye can see the picture taken from the left perspective, and the right eye can see the picture taken from the right perspective, and the stereoscopic image is synthesized through the convergence function of both eyes.

Stereo film is a two-angle image of a scene with two lenses, such as human eyes. Then through two projectors, the images of two viewpoints are projected synchronously, so that two slightly different images are displayed on the screen. At this time, if you look at it directly with your eyes, the images you see are overlapping and somewhat blurred. If you want to see stereoscopic images, you must take measures so that your left eye can only see the left image and your right eye can only see the right image. For example, a polarizer in the opposite direction is installed in front of each projector to function as a polarizer, and the light emitted by the projector passes through the polarizer. It becomes polarized light, and the polarization directions of the polarizers in front of the left and right projectors are perpendicular to each other, so the polarization directions of the two polarized lights are also perpendicular to each other. These two beams of polarized light are projected on the screen and then reflected to the audience, and the direction of polarized light remains unchanged. Viewers use polarized glasses corresponding to the polarized light to watch, that is, the left eye can only see the picture reflected by the left machine and the right eye can only see the picture reflected by the right machine, thus seeing a three-dimensional scene, which is the principle of three-dimensional movies. Complementary colors, switches, cylindrical mirrors, slit gratings, etc. They are all based on the basic principle that the left eye sees the left picture and the right eye sees the right picture, and the different ways to watch three-dimensional images on the screen. With the development of science and technology, people will have more ways to see three-dimensional images on the screen.