Ievads of the historical development of laser rangefinder
Laser rangefinder is an instrument that uses a certain parameter of modulated laser to accurately measure the distance of the target. The impulss lāzers diapazona meklētājs izstaro/a īss impulss lāzers stars vai a sērija of īss impulss lāzers stari to mērķis kad darbojas, un lāzers stars atstarots by mērķis mērķis is saņemts by the fotoelektriskais elements. The timer measures the time from emission to reception of the laser beam and calculate the attālums no the rangefinder to the target.
Kad jauda of izstarotais lāzers stars ir pietiekams, the mērīšana diapazons var sasniegt apmēram 40 kilometri vai pat vairāk, un lāzers diapazona meklētājs var darbs diena un nakts, bet kad tur ir a viela ar augsta absorbcija ātrums of lāzers in the space, the diapazons attālums un precizitāte būs samazināsies.
Pirmais lāzers in the world was a ruby laser first developed by Meiman, a scientist of Hughes Aircraft Company in the United States in 1960. On this basis, the U.S. military soon carried out research on military laser devices. In 1961, the laser rangefinder used by the First Taiwan Army pass the demonstration test of the US military, and the laser rangefinder soon enter the practical stage.
As the price of laser rangefinder keeps dropping, laser rangefinder is gradually used in industry. A number of new micro rangefinders have appeared at home and abroad, who have the benefits of fast range, small size and reliable performance, and can be widely use in industrial measurement and control, mines, ports and other fields.
Laser is a new technology developed in the 1960s. It is a kind of light with pure color, highly concentrated energy and good directivity. Laser rangefinder is an instrument\that uses laser to measure distance. Its working principle is simple: the distance is defined by measurement the time from the start of laser emission to the reflection of laser from the target. For example, a laser range finder is used to measure the distance from the moon. If the time from the start of laser emission to the reflection from the moon is determined to be 2.56 seconds, the one-way time for laser emission to the moon is equal to 1.28 seconds, and the speed of laser is the speed of light, who is equal to 300,000 kilometri per second. Tāpēc, the mērītais attālums no mēness līdz the earth is the product of one-way time and the speed of light, that is, 384 tūkstoši kilometri. In order to transmit and receive laser and time, the laser rangefinder consist of laser raidītājs, uztvērēj, clock oscillator and distance counter.
Laser rangefinder can also be used to track and measure satellites, measure the flying height of aircraft, aim and measure targets, and conduct topographic mapping and reconnaissance.
