Basic knowledge of laser rangefinder
what is the working principle of laser rangefinder
laser rangefinder I 2. Loading times: 2million times. Generally, two methods are used to measure the distance: pulse method and phase method. The process of pulse ranging is as follows: the laser emitted by the rangefinder is reflected by the measured object and then received by the rangefinder. The rangefinder records the round-trip time of the laser at the same time. Half of the product of the speed of light and the round-trip time is the distance between the rangefinder and the measured object. The accuracy of distance measurement by pulse method is generally about +/- 1m. In addition, the measurement blind area of this kind of rangefinder is generally about 15 meters
what are the main application fields of laser rangefinder
laser rangefinders have been widely used in the following fields: power, water conservancy, communication, environment, architecture, geology, police, fire protection, blasting, navigation, railway, counter-terrorism/military, agriculture, forestry, real estate, leisure/outdoor sports, etc
why does the laser rangefinder also introduce the difference between "safe" and "unsafe" for these parameters in detail
Gu Ming asked the experimental machine to carry out the tension, tensile strength, yield strength and elongation of metal tensile samples at the speed specified in gbt228 standard. The laser rangefinder uses laser as the main working material. At present, the working substances of handheld laser rangefinders on the market mainly include the following: semiconductor lasers with working wavelengths of 905 nm and 1540 nm, and YAG excitation with working wavelength of 1064 nm can discharge light from the internal air. The wavelength of 1064 nm is harmful to human skin and eyes, especially if the eyes accidentally contact the laser with the wavelength of 1064 nm, the damage to the eyes may be permanent. Therefore, in foreign countries, 1064 nm laser has been completely banned in handheld laser rangefinders. In China, some manufacturers also produce 1064 nm laser rangefinders
for 905nm and 1540 nm laser rangefinders, we call them "safe". For 1064 nm laser rangefinder, because it is potentially harmful to human body, we call it "unsafe"