Why are the so-called "safe" and "unsafe" laser range finders different?
As the name implies, the laser rangefinder is a measurement tool that uses laser as a carrier to achieve distance measurement. At present, the lasers used in the handheld laser rangefinders on the market mainly include the following types: semiconductor lasers with operating wavelengths of 905 nm and 1540 nm, and YAG lasers with operating wavelengths of 1064 nm. The wavelength of 1064 nanometers is harmful to human skin and eyes, especially if the eyes accidentally come into contact with the laser with a wavelength of 1064 nanometers, the damage to the eyes may be permanent. Therefore, in foreign countries, the 1064 nanometer laser is completely banned in the handheld laser rangefinder. In China, some manufacturers also produce 1064nm laser rangefinders.
For 905nm and 1540nm laser rangefinders, we call them "safe". For the 1064nm laser range finder, because it has potential hazards to the human body, we call it "unsafe".
The laser rangefinder uses laser for distance measurement, and the pulsed laser beam is a monochromatic light source with very concentrated energy. Therefore, when using it, do not look directly at the launch port, and do not use an aiming telescope to observe the smooth reflective surface, so as not to Harm to human eyes. Be sure to measure according to the safe operation specification in the instrument manual. When measuring in the field, do not point the launch port of the instrument directly at the sun to avoid burning out the photosensitive element of the instrument.
