Do laser measurers work?laser measurers

Do laser measurers work?

Laser rangefinders generally use two methods to measure distance: pulse method and phase method. The process of pulse ranging is as follows: the laser emitted by the rangefinder is reflected by the measured object and then received by the rangefinder. The rangefinder records the round-trip time of the laser at the same time. Half of the product of the speed of light and the round trip time is the distance between the rangefinder and the measured object. The accuracy of distance measurement by pulse method is generally about +/-1m. In addition, the measurement blind area of this kind of rangefinder is generally about 5 meters.

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Laser range finders (LRFS) all use the same basic concept. Rangefinder: press the button of the rangefinder to emit laser beam. These beams are reflected back from the distant target, and the total time of the beam from emission to reflection is measured by the built-in high-speed clock of the rangefinder. Because we know how to quickly measure the beam speed (i.e. the speed of light), we can use this time difference to measure and calculate the distance, and then display the distance from the target to the user on the screen of the rangefinder.

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