The working principle of the infrared rangefinder: using the non-diffusion principle of infrared transmission, because the refractive index of infrared rays is very large when passing through other substances, the long-distance rangefinder will consider infrared rays. The propagation of infrared rays takes time, and when the infrared rays emitted by the rangefinder hit the reflector, they are reflected back and received by the rangefinder. The distance can then be calculated based on the time from infrared transmission to reception and the transmission speed of infrared. The magnet of the laser infrared measuring instrument, which is called the laser infrared photoelectric distance measuring instrument in the industry, is a specific high magnetic permanent magnet.
