The principle of ranging telescope

Laser rangefinders generally use the pulse method to measure distance.
The laser rangefinder emits a beam or a sequence of laser pulse beams to the object being measured. The laser is reflected by the object being measured and then returns to the detection end of the rangefinder. The rangefinder obtains the distance measurement by calculating the round trip time of the laser. The distance between the instrument and the object being measured.
In fields such as outdoor sports and ballistic calculations that do not require high accuracy, ordinary laser rangefinders with an accuracy of about +/- 1 meter are generally used.
In fields with higher demand such as construction, land surveying, power monitoring, and engineering surveying, high-precision laser rangefinders are generally used. High-end products such as PAS can reach 0.3 meters.
In addition, since the laser rangefinder needs to ensure the collimation of the optical system and laser system within a wide measurement range, it usually has a measurement blind zone. The blind zone of a better ranging telescope can reach 3.5 meters, and the average ranging telescope is 10 meters. to 15 meters.