What is the working principle of a laser rangefinder
Laser rangefinder http://www.18show.cn/product/st749.html Laser rangefinders generally use two methods to measure distance: pulse method and phase method. The process of pulse method ranging is as follows: the laser emitted by the rangefinder is reflected by the measured object and then received by the rangefinder, which records the time when the laser returns. 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 pulse method distance measurement is generally around+/-1 meter. In addition, the measurement blind spot of such rangefinders is generally around 15 meters.
What are the main application areas of laser rangefinders?
Laser rangefinders have been widely used in the following fields: electricity, water conservancy, communication, environment, construction, geology, law enforcement, fire protection, blasting, navigation, railways, military, agriculture, forestry, real estate, leisure/outdoor sports, etc. Why is there a difference between "safe" and "unsafe" in laser rangefinders?
As the name suggests, a laser rangefinder uses laser as the main working material for its operation. At present, the working materials of handheld laser rangefinders on the market mainly include semiconductor lasers with working wavelengths of 905 nanometers and 1540 nanometers, and YAG lasers with working wavelengths of 1064 nanometers. The wavelength of 1064 nanometers is harmful to human skin and eyes, especially if the eyes accidentally come into contact with 1064 nanometers of laser, the damage to the eyes may be * *. So, in foreign countries, the 1064 nanometer laser has been completely banned from handheld laser rangefinders. In China, some manufacturers also produce 1064 nanometer laser rangefinders.
For laser rangefinders at 905 nanometers and 1540 nanometers, we call them unsafe. For the 1064 nanometer laser rangefinder, due to its potential harm to the human body, we call it "not * *".
