The history of handheld laser rangefinders
A laser rangefinder is an instrument that uses a laser to accurately determine the distance to a target. Laser rangefinder in the work to the target shot a very fine beam of laser laser rangefinder light, by the photoelectric components to receive the target reflected laser beam, timer to determine the laser beam from the launch to receive the time to calculate the distance from the observer to the target. If the laser is continuously emitted, the range can be up to about 40 kilometres, fluorine-lined butterfly valve and can be operated day and night. If the laser is pulsed, the absolute accuracy is generally low, but for long-distance measurements, a good relative accuracy can be achieved. The world's first laser, is by the United States Hughes aircraft company scientists Meiman in 1960, first developed successfully. The U.S. military soon on this basis to carry out research on military laser devices. 1961, the first military laser rangefinder through the U.S. military demonstration test, on the laser rangefinder soon thereafter into the practical joint body. Laser rangefinder light weight, small size, easy to operate fast and accurate, its error is only one-fifth to several hundredths of other optical rangefinder, and thus is widely used in terrain surveying, battlefield surveying, tanks, aircraft, ships and artillery on the target of the measurement of the distance, measurement of clouds, aircraft, missiles, and the height of the satellite and so on. It is an important technical equipment to improve the accuracy of high tanks, aircraft, ships and artillery. As the price of laser rangefinders continue to fall, the industry has gradually begun to use laser rangefinders. At home and abroad, there are a number of new types of distance measuring fast, small size, reliable performance and other advantages of the miniature rangefinder, can be widely used in industrial measurement and control, mining, ports and other fields. The main classification of one-dimensional laser rangefinder for distance measurement, positioning; two-dimensional laser rangefinder (Scanning Laser Rangefinder) for contour measurement, positioning, area monitoring and other fields; three-dimensional laser rangefinder (3D Laser Rangefinder) for three-dimensional contour measurement, three-dimensional spatial positioning and other areas.
