Brief Introduction Of Three Kinds Of Laser Rangefinders

Laser ranging uses a laser as a light source for ranging. According to the way the laser works, it can be divided into continuous lasers and pulsed lasers. Gas lasers such as helium-neon, argon ion, krypton-cadmium, etc. work in a continuous output state for phase laser ranging; double heterogeneous gallium arsenide semiconductor lasers can be used for infrared ranging; solid lasers such as ruby and neodymium glass can be used For pulsed laser ranging.

Compared with the photoelectric rangefinder, the laser rangefinder can not only work day and night, but also improve the accuracy of range measurement and significantly reduce the weight due to the characteristics of the laser's monochromaticity and strong directionality, coupled with the semiconductor integration of the electronic circuit. And power consumption, so that the measurement of the distance to the artificial earth satellite, the moon and other distant targets becomes a reality. If the laser is fired continuously, the measuring range can reach about 40 kilometers, and the operation can be carried out day and night. If the laser is pulsed, the absolute accuracy is generally low, but for long-distance measurement, a good relative accuracy can be achieved.

Handheld laser rangefinder

The measuring distance is generally within 200 meters, and the accuracy is about 2mm. This is currently the most widely used laser rangefinder. In addition to measuring the distance, it can generally calculate the volume of the measured object.

Telescope laser rangefinder

The measuring distance is generally about 600-3000 meters. This type of rangefinder measures a relatively long distance, but the accuracy is relatively low, and the accuracy is generally about 1 meter. The main application range is long-distance measurement in the field.

Industrial laser rangefinder

The measuring distance is about 0.5-3000 meters, and the accuracy is within 50mm. A reflector should be installed outside 300 meters. Some products can also measure speed while measuring distance. Mainly used in position control, such as vehicles and ships; positioning cranes; loading and unloading and handling equipment; aircraft measurement, mainly for measuring flying height; metallurgical process control; measuring objects that are not suitable for approach, such as pipe filling, pipelines, containers, etc., and Water level measurement. Typical sensors are LDM301 and LDM4x.