This is an era of rapid development of science and technology, and people's life is increasingly dependent on scientific and technological achievements. Take the laser rangefinder. Once people measured intervals with tape measures, dropped calls, measurements, and so on. Now they just press a button on this small laser rangefinder. And the laser rangefinder is more accurate and smaller than traditional measurement methods. It is light in weight and easy to carry.
Because of its wide range of USES, the development of laser rangefinders is unstoppable. There are pulsed laser rangefinders and phase laser rangefinders on the market.Although both are used to measure intervals, they have their own advantages, among which pulsed laser rangefinders have wide measurement scale and poor accuracy, while phase laser rangefinders have small measurement scale but high accuracy up to good millimeters. Among them, the application field of pulsed laser ranging is also increasingly broad, such as terrain measurement, tactical frontier ranging, missile orbit tracking and satellite, the measurement of the distance between the earth and the moon.Pulse laser ranging method is the use of laser pulse duration is very short, relatively concentrated energy, instantaneous power is very large characteristics, in the case of cooperation policy, pulse laser ranging can reach very far range;If only the weak reflection signal obtained by the diffuse reflection of the pulse laser of the measured policy is used, it can also be located.Therefore, pulsed laser ranging method is widely used.
A brief explanation of the working principle of the pulsed laser rangefinder: the laser emitted by the rangefinder is reflected by the measured object and then accepted by the rangefinder. The rangefinder also records the time of the laser's reciprocation. Half the product of the speed of light and the time of reciprocation is the distance between the rangefinder and the measured object.
Pulse laser rangefinder measurement accuracy is poor, the general accuracy can only reach the level of m, so some high precision requirements of the occasion may be the project needs to use phase laser rangefinder.But the measurement of distance intervals because of the scale of measurement, the measurement error of one or two meters is now very high precision.