What are the applications of laser rangefinders? What are the classifications?

“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 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.

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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 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 photoelectric rangefinders, laser rangefinders can not only work day and night, but also improve the accuracy of range finding and significantly reduce weight due to the characteristics of laser monochromaticity and strong directionality, coupled with the semiconductor integration of Electronic circuits. 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 measurement 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 inaccessible objects, such as pipe filling, pipes, containers, etc., and Water level measurement. Typical sensors are LDM301 and LDM4x.

At present, the most well-known brands of laser rangefinders include Tuyad from the United States, Alpha from Germany, Basco from the United States, Newcomb from Canada, and Nikon from Japan. From simple distance measurement to three-dimensional space positioning, the functions and application fields of laser ranging instruments are also constantly developing.

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