Introduction to the functional characteristics of phase method rangefinder
Under given modulation and standard atmospheric conditions, the frequency c/(4 π f) is a constant, and the measurement of distance becomes the measurement of the number of half wavelengths included in the measuring line and the measurement of fractional parts less than half wavelengths, i.e. N or φ， Due to the development of modern precision machining technology and radio phase measurement technology φ The measurement has achieved high accuracy.
In order to measure the phase angle of less than π φ， Different methods can be used for measurement, and the most commonly used methods are delay phase measurement and digital phase measurement. Currently, short range laser rangefinders use the principle of digital phase measurement to obtain φ。
As mentioned above, in general, phase laser ranging uses a continuous laser beam with modulated signals. In order to achieve high ranging accuracy, cooperative targets need to be configured. The currently launched handheld laser rangefinder is another new type of rangefinder among pulse laser rangefinders, which is not only small in size and light in weight, but also uses digital phase measurement pulse broadening and subdivision technology. Without the need for cooperative targets, millimeter level accuracy can be achieved, and the measurement range has exceeded 100m, And it can quickly and accurately display the distance directly.
Precautions when using a laser rangefinder
Attention when using a laser rangefinder: The laser rangefinder cannot be aimed at the human eye for direct measurement to prevent harm to the human body. Meanwhile, general laser rangefinders do not have waterproof functions, so it is necessary to pay attention to waterproofing. The latest American Leopold laser rangefinder is mainly suitable for outdoor hunting enthusiasts in the United States, so the advantage of its production is that it can be waterproof and fogproof, and is equipped with colorful jungle tree branches and leaves.
The laser does not have the function of preventing falling, so the laser rangefinder is easy to damage the illuminator.
Laser rangefinder maintenance:
① Regularly inspect the appearance of the instrument and promptly remove surface dust, dirt, grease, mold, etc.
② When cleaning eyepieces, objectives, or laser emission windows, a soft dry cloth should be used. It is strictly prohibited to scratch with hard objects to avoid damaging the optical performance.
③ This machine is a high-precision instrument that integrates optics, mechanics, and electronics. It should be handled with care during use and is strictly prohibited from squeezing or falling from a height to avoid damaging the instrument.
