How many types of 3D glasses are there? What are the main differences?
A simple surface; quite complicated!3D glasses are basically there are three categories, namely: Polaroid, red and green and blue and red tablets; use are respectively; according to the need to be considered by what 3D objects are making and use, have good stereo effect.Simply speaking, the instructions to the production company are that, for example, movies, picture books, etc., will have gifts or borrow articles, and there will be no problem using them.If there is no guidance, it will be annoying, in addition to the above three different types, each must be left and right; that is:"Red and blue" points left red, right blue and left blue, right red.Red, green, red, left, right, green, left green, right red."Polarization" is more complex, because the color of the lens is about the same gray, the naked eye can not be about what is different, in fact, there are direct filter and horizontal filter, but also to be divided about.If not appropriate, in addition to the stereo effect is poor, will make the image mask paste, and the occurrence of eye discomfort and dizziness and other problems, which requires careful coordination.
1, red and blue red green glasses 3DThis kind of glasses a lot of color type, more see is red and blue and red, the color difference must be used for the corresponding 3D color image, the effect is very poor and otherwise it will see no effect. The principle of work is to use light in the corresponding color and different color of the pass, so that two eyes only see the image, one of the 2 pictures. This kind of glasses has a long history, and this model was used frequently in early 3D movies. Characterized by cheap, affordable, almost no maintenance costs, good applicability, some enthusiasts 3D works or 3D network movies in this way. But there are many disadvantages, such as insufficient light flux, dim picture, image color variation and so on. Now in the field of professional screenings have basically eliminated for many years. Since color filters are used to separate pictures, they are also known as color separation or color filtering.
3 、 liquid crystal shutter glassesSounds complicated. Actually, the principle is simple. It's the left eye, the left eye, the right eye, and the right eye. 3D video playback, the screen is the same as the polarization film is two images, but these two images are alternately fast flashing, A figure appears B map disappears, B figure appears A disappear. At the same time, liquid crystal shutter glasses will be in accordance with the signal film to the lens switch synchronization alternately corresponding to the AB two, the actual use of flickering switch when the shutter and image glasses will soon, the eye is not feel the beating of the shutter. This technique works well, but the equipment is expensive and has some restrictions. Long time watching can cause eye fatigue, and the signals are easily disturbed. When Afanda was shown, some theaters used the technique, which interfered with the surrounding viewers' glasses signals when the audience walked around. Some home style 3D products now use this technology more. This technique uses the shutter lag principle to process 3D images, hence the name "time-sharing".
2 polarizing mirrorThis is a common 3D movie solution in the cinema, the so-called polarization, the basic principle of actually, and some polarized camera lens or sunglasses almost. It can be divided into two types: linear polarization and circular polarization. The linear polarization is relatively simple, using XY two orientations, namely through the polarizing lens two glasses on different deflection directions, respectively, let two eyes can only see a vertical and horizontal image superimposed on the screen, to see stereo effect. Circular polarization is 3D polarization technology, a new generation of glasses technology compared to the XY polarization that thin plastic film is more complex than this; as the name suggests, it is a circular polarized lens rotation, a left rotation, a right rotation, so two different directions of the image will be apart. This polarization allows it to basically achieve a full range of 3D, not like the XY line polarization must maintain the level of glasses / vertical angle. Because it mainly uses the deflection of the lens to light, it is also called "splitting" technology.
