History of Handheld Laser Rangefinders
A laser rangefinder is an instrument that uses a certain parameter of a modulated laser to measure the distance to a target. The measuring range of the laser range finder is 3.5~5000 meters.
According to the distance measuring method, it is divided into phase method range finder and pulse method range finder. The pulse laser range finder emits a beam or a series of short pulse laser beams to the target during operation, and the photoelectric element receives the laser reflected by the target. The timer measures the time from launch to reception of the laser beam, and calculates the distance from the observer to the target. The phase method laser rangefinder detects the distance by detecting the phase difference between the emitted light and the reflected light when it propagates in space. The laser range finder is light in weight, small in size, easy to operate, fast and accurate, and its error is only one-fifth to several hundredths of other optical range finders. The picture on the right is a typical phase method range finder and pulse
The laser rangefinder is an instrument that uses laser to accurately measure the distance of the target. When the laser rangefinder is working, it emits a very thin laser beam to the target. The photoelectric element receives the laser beam reflected by the target. The distance to the target. If the laser is emitted continuously, the measurement range can reach about 40 kilometers, and it can work day and night. If the laser is emitted in pulses, the absolute accuracy is generally low, but it can achieve good relative accuracy when used for long-distance measurements. The world's first laser was successfully developed in 1960 by Maiman, a scientist from the Hughes Aircraft Company of the United States. The U.S. military soon launched research on military laser devices on this basis. In 1961, the first military laser range finder passed the demonstration test of the US military, after which the laser range finder soon entered the practical complex. The laser range finder is light in weight, small in size, easy to operate, fast and accurate, and its error is only one-fifth to several hundredths of other optical range finders, so it is widely used in terrain measurement, battlefield measurement, tank , Aircraft, ships and artillery to the target range, measuring the altitude of clouds, aircraft, missiles and artificial satellites, etc. It is an important technical equipment to improve the accuracy of high tanks, aircraft, ships and artillery. Due to the continuous reduction in the price of laser range finders, the industry has gradually begun to use laser range finders. At home and abroad, a batch of new miniature rangefinders with the advantages of fast ranging, small size and reliable performance have emerged, which can be widely used in industrial measurement and control, mines, ports and other fields. Main classification One-dimensional laser rangefinder is used for distance measurement and positioning; two-dimensional laser rangefinder (Scanning Laser Rangefinder) is used for contour measurement, positioning, area monitoring and other fields; three-dimensional laser rangefinder (3D Laser Rangefinder) is used for 3D profile measurement, 3D space positioning and other fields.
