It is an instrument that uses a certain parameter of the modulated laser to achieve distance measurement of the target. Laser rangefinder measurement range of 3.5 to 5000 meters.
According to the distance measurement method, it is divided into a phase method and a pulse method. The pulse type laser range finder emits a beam or a series of transient pulsed laser beams to the target during operation. The laser beam is reflected by the photoelectric element and received by the target. Beam, the timer measures the time from laser beam emission to reception and calculates the distance from the observer to the target. The phase method laser distance meter detects the distance by detecting the phase difference that occurs when the emitted light and the reflected light propagate in space. The laser rangefinder is lightweight, small in size and easy to operate. The error is only one-fifth to one-hundredth of that of other optical distance meters. In the right figure, it is a typical phase method rangefinder. And pulse method rangefinder map.