3d glasses

3D glasses are divided into three types

1. Spectroscopy: the different polarization angles of the polarized lens make the left and right eyes see the corresponding picture respectively. It is divided into IMAX system and RealD system, but the cost of IMAX system is higher, so RealD system has a larger market share, and RealD currently has more than 80% of the North American market.
2. Color separation system: from the earliest red and blue lenses to the current Dolby color separation system; the price is not high, but the red and blue lenses are eliminated in current theaters. If it is a red and blue color separation movie downloaded at home , You can use this.
3. Time-sharing system: it is the electronic shutter system. By alternately opening and closing the left and right eyes, the left and right eyes can see the corresponding pictures respectively. Xpand is an electronic shutter type, which is more expensive and has better results.

3D glasses in movie theaters are generally made of polarized lenses, and the cost is not high, but the projectors that play 3D movies must also have a pair of polarized lenses to see the three-dimensional effect through polarized lenses. If you wear this kind of glasses to look at the LCD/LED display screens of ordinary computers or mobile phones, most of them are bright and dark, and the colors are not accurate. Some 3D TVs use polarization technology, which is similar to movie theaters. They play 3D format film sources (three-dimensional Blu-ray DVD), and use the correct polarization glasses to see the three-dimensional effect. The principle of polarized glasses is the same, but the products of each factory may not be unified and may not be universal. There is also an active stereo glasses that directly control the occlusion of the left and right lenses. The field of view is brighter, but the glasses are bulky and require batteries and a signal source. On a computer, the control signal is obtained through an IR jack on the graphics card. Use infrared or directly connect to the glasses to control. To view this kind of image, you need a corresponding graphics card and glasses, as well as a monitor with a relatively high refresh rate. It is generally used for high-end games or some scientific research projects. It is estimated that there are not many movies that support this format.

The 3D glasses adopt the most advanced "time division method", which is realized by the signal synchronized between the 3D glasses and the display. When the display outputs a left-eye image, the left eye lens is in a light-transmitting state, and the right eye is in a opaque state, and when the display outputs a right-eye image, the right eye lens transmits light and the left eye does not transmit light, so two glasses I saw different game screens to achieve the purpose of deceiving the eyes.
With such frequent switching, the two eyes can obtain nuanced images respectively, and the brain calculates to generate a 3D stereoscopic image. 3D glasses are designed with sophisticated optical components. Compared with passive glasses, they can achieve double resolution and a wide viewing angle for each eye.

principle:The main reason for the stereoscopic effect is that the left and right eyes see different pictures, and the positions of the left and right eyes are different, so there will be some differences in the pictures. When shooting stereo images, two lenses are used, one on the left and the other on the right. Then the image of the left lens is filtered by a horizontal polarizer to obtain horizontally polarized light, and the image of the right lens is filtered by a vertical polarizer to obtain longitudinally polarized light. The left eye and the right eye of the stereo glasses are respectively equipped with a horizontal polarizer and a vertical polarizer. The horizontally polarized light can only pass through the horizontal polarizer, and the longitudinally polarized light can only pass through the vertical polarizer. This ensures that things captured by the camera on the left can only enter the left eye, and things captured by the camera on the right can only enter the right eye, so it is almost stereoscopic.

We have various styles of 3d glasses