Why does VR head lens configuration? Do you know these principles?

Why does VR head lens configuration? Do you know these principles? The VR industry has begun to show explosive growth under the cold winter of capital, and more users choose to join the VR experience. To understand VR, first of all start with the working principle of VR, today Yoo gave a brief introduction for everyone. From human vision to VR applications The eye has a lens behind the pupil, and a sensory surface on the back that can convert incident light into useful visual information. The lens refracts light to the sensor. The curvature of the lens depends on the distance between the eye and the object. If the object is close, the lens needs to be bent sharply to give a clear image. If the object is far away, the lens can be bent only slightly. With age, the lens loses its elasticity and its ability to refract light deteriorates. This is why young people can see objects close to 7cm, while older people can't. Therefore, it is actually not easy to see what is within 3-7cm of our eyes. This is the role of the virtual reality lens. Why do you need a lens? The head lens is needed to correct the angle of the lens light source and read it again by the human eye. When the eyes are far away, the fixation point is infinity, the rays are parallel, and the lens is at rest. If the object is like a small fly close to your eyes, you should always look at it, and the lens will bend and the parallel state of light will break. If you want to keep watching the fly, all the single light emitted from the fly needs to be focused on one point of the eye. If the fly is too close, the lens is not flexible enough to bend and the eye loses focus. The light beam hits the lens from different angles. It will feel the distance between the eye and the object. However, the distance is not so far. At present, there is no comprehensive solution to the choice of lens. Using less-threaded lenses helps focus the beam and increase contrast, but the sharpness of the image can be compromised. Multi-threaded lenses can see sharper images, but light cannot be focused on one point and the curvature is always incorrect.