What is laser distance meter

According to the ranging method, it is divided into phase method rangefinder and pulse method rangefinder. The pulse laser rangefinder emits a beam or a sequence of short pulse laser beams to the target during operation, and the laser beam reflected by the target is received by the photoelectric element. The timer measures the time from emission to reception of the laser beam, and calculates the distance from the observer to the target. The phase method laser rangefinder detects the distance by detecting the phase difference between the transmitted light and the reflected light when they propagate in space.