Professional Hand Tools Pd-54n 56n 58n Series Laser Instrument

The phase method laser rangefinder detects the distance by detecting the phase difference between the emitted light and the reflected light when they propagate in space. The laser rangefinder is light in weight, small in size, simple in operation, fast and accurate, and its error is only one-fifth to one-hundredth of that of other optical rangefinders. In the right figure, there are typical phase method rangefinders and pulse method rangefinders.

Laser rangefinder is an instrument that can accurately measure the distance of the target by using a parameter of modulated laser. Pulse laser rangefinder is to shoot a beam or a series of short pulse laser beams to the target when working, and the laser beam reflected by the target is received by the photoelectric element. The timer measures the time from the laser beam to the reception, and calculates the distance from the rangefinder to the target.