VR is Virtual Reality. It is a wearable computer simulation system. It allows people to experience the virtual world. It enables the computer to generate a simulated environment. This system can merge multiple information. Interactive three-dimensional dynamic and physical behaviors can immerse users in the environment.

In VR, a new field. People are most familiar with VR glasses. The full name of VR glasses is virtual reality head-mounted display device. Do you know the principle of VR glasses equipment?

VR glasses are configured with two lenses. VR lens belongs to optical imaging. The surface of the lens has the effects of flat convex, concave convex and double convex. The lens is characterized by a thick center and a slightly thinner edge. Convex lenses can correct the angle of the lens light source. It can be read again by human eyes. So as to increase the perspective and enhance the stereoscopic impression. Give people a sense of immersion.

If VR glasses do not have convex lenses. What we can see is small. The visual effect is not good. This does not achieve the immersion we want. The core technology of VR glasses is display technology. Display technologies include interleaved display, picture switching and visual tolerance.

The interleaved display mode works as follows. Divide a picture into two fields. Singular tracing lines form singular scanning line graph field or single graph field. Even tracing lines form even scanning line graph field or even graph field.

When using interleaved display mode for stereo imaging. We can divide the left-eye image and the right-eye image into single-image field and even-image field (or opposite order). We call this stereo interleaved format.

If you use shutter stereo glasses with staggered mode. We need to use the vertical synchronization signal of the map field as the shutter switching synchronization signal.

The working principle of picture interaction is as follows. The left and right eye images are interactively displayed at the top of the screen. Using stereo glasses to match this kind of stereo display form. We need to use the vertical synchronization signal as the shutter switching synchronization signal. This allows imaging. Using other stereo display devices. We need to send the left and right eye images to the left and right eye devices.

People can see three-dimensional scenery. Because the eyes can see things alone. There is a spacing between the left and right eyes. There will be slight deviation in the angle of view between the two eyes. This difference will produce displacement. The images we see left and right will have certain parallax. The human brain fuses the images of the two eyes. In this way, a stereoscopic visual effect of spatial sense is produced.

VR glasses have many applications. Health care is an area that cannot be ignored in VR glasses application. This year, many new VR technologies for health care have emerged. We should pay attention to this.