How 3d level sensor works
Essentially, 3D sensing technology mainly refers to the tracking of the characteristics and position of objects over time. To accomplish this, the human eye possesses two sensors of different wavelengths (the lens and the optic nerve), and the brain is a complex processor. Through the synergy of the eyes and the brain, humans can observe light with wavelengths in the range of 390-700nm. A 3D sensing device works basically the same way, except that it is usually equipped with an illumination source.
Imagine a gamer swinging a golf club in front of a 3D level sensor. In this case, the lighting elements in the sensing device emit invisible light that "illuminates" the player and the environment around them. Since light bounces off the player back to the sensing device, the optical filter blocks stray light and ambient light, allowing only the near-infrared spectrum to pass through the optical sensor. By interpreting changes in light, the sensor can draw a 3D digital image of the player's movements, which is continuously fed back to the game program.