elescope-type laser rangefinders typically adopt a single-eyepiece and single-objective design, with built-in components including a laser emitter, receiver, transmissive LCD screen, and circuit board, among others. Coupled with a sophisticated optical system, these devices enable both long-distance observation and precise distance measurement, making them an indispensable tool for diverse scenarios.
Their core working principle is based on the propagation properties of laser light. The emitter projects a laser beam, the receiver captures the signal reflected from the target, and a timer calculates the round-trip time of the laser. Combined with the speed of light, the distance is quickly computed and displayed on the screen. Most general-purpose rangefinders are equipped with 905 nm laser emitters, which produce Class 2 eye-safe laser beams. Mainstream models offer a ranging capability of 500 to 3000 meters, with an accuracy of approximately 1 meter; some manufacturers can reduce the error margin to 0.3–0.5 meters.
Working Principle of Range Finders – Measuring the Distance Between Points A and B Laser range finders typically use two methods to measure distance: the pulse method and the phase method. Pulse Method for Ranging
