What is the Error of a Laser Rangefinder?
Measurement accuracy complies with ISO/R1938-1971 recommended by ISO, with 95% statistical reliability (2s, twice the standard deviation). The standard measurement accuracy refers to the specified measurement error under normal measurement environments. It is invalid for special application functions and calculations, such as Pythagorean measurement and tracking mode (continuous tracking measurement).
There are two operating methods for laser rangefinders: the pulse method and the phase method.
For laser rangefinders adopting pulse emission, the absolute accuracy is generally lower, yet favorable relative accuracy can be achieved for long-distance measurement.
For laser rangefinders using the phase-shift method, the accuracy can reach ±1 mm, which is the highest among rangefinders.
The accuracy error of a laser rangefinder is not proportional to the measured distance and remains constant across the full measurement range. Nevertheless, ultra-long distances introduce an error of ±5 ppm (parts per million) (±0.5 mm / 100 m).
The accuracy of laser rangefinders has long attracted attention from industry professionals. High-precision laser rangefinders are required in some industries. For mid-to-long range laser rangefinder binoculars, the typical maximum accuracy is 1 yard ±1. Current high-precision laser rangefinders feature an accuracy of 0.5 yard ±1. Such high-precision instruments can achieve an accuracy within 0.5 yards within 100 meters.
The main errors of rangefinders stem from measurement mistakes, such as blocked or penetrating laser beams, incorrect selection of measurement endpoints, and wrong setting of measurement starting points on the rangefinder. Under ideal conditions, the error is minimal.
