Laser Distance Measuring Instrument Routine Maintenance
Laser rangefinders need to pay attention to the use of the problem: laser rangefinders can not be aimed at the human eye direct measurement, to prevent harm to the human body. At the same time, the general laser rangefinder does not have waterproof function, so you need to pay attention to waterproof. The latest U.S. Leo Porter laser rangefinder, because the local U.S. mainly for outdoor hunting enthusiasts, so the advantages of the production of the place that can be waterproof and anti-fog, with jungle tree branches and leaves painted color.
Laser does not have the function of anti-drop, so the laser rangefinder is very easy to drop the luminescent device.
Laser rangefinder maintenance:
① often check the appearance of the instrument in a timely manner to remove the surface of the dust and dirt, grease, mold and so on.
② Clean the eyepiece, objective lens or laser emission window should use a soft dry cloth. Strictly prohibit the use of hard objects scratches, so as not to damage the optical properties.
③ This machine is optical, mechanical and electrical integration of high-precision instruments, use should be carefully and gently put, is strictly prohibited from extrusion or falling from a height, so as not to damage the instrument.
Functional characteristics of the phase method rangefinder Introduction
In the given modulation and standard atmospheric conditions, the frequency c/(4πf) is a constant, at this time the measurement of distance becomes the measurement of the number of half-wavelengths contained in the measurement line and less than half-wavelength of the measurement of the fractional part of the measurement of N or φ, due to the development of modern precision machining technology and radio phase measurement technology, the measurement of φ has reached a high degree of accuracy.
In order to measure the phase angle φ of less than π, can be measured by different methods, usually the most widely used is the delayed phase measurement and digital phase measurement, the current short-range laser rangefinder are used to obtain the φ of the digital phase measurement principle.
From the above mentioned general circumstances phase type laser ranging using continuous emission of laser beams with modulated signals, in order to obtain high accuracy ranging also need to configure the cooperation target, and the current introduction of handheld laser rangefinder is a pulse laser rangefinder in another new rangefinder, it is not only small, light weight, but also the use of digital phasing pulse spreading subdivision technology, without the need to cooperate with the target to achieve millimeter-level accuracy, measuring range has been More than 100m, and can quickly and accurately display the distance directly.
