Laser rangefinder cleverly sticks white paper to measure highly reflective or highly penetrating target surfaces
The ideal measurement reflection surface of the laser rangefinder is a white, hard and flat diffuse reflection surface. If the measurement surface is too smooth, such as a mirror surface or a smooth metal surface, the laser line will reflect, so the actual measurement result will be larger; if the measurement surface is penetrating, if it is a transparent glass or liquid surface, the laser line will occur Penetration and refraction, so the actual measurement result will be small, in both cases, paste a piece of white paper on the target surface and then measure it.
