Conceptually speaking, ranging telescopes can be divided into two categories, one is binoculars with scale display, and the other is laser rangefinder telescopes. Conceptually speaking, the first category is not called a range-finding telescope, because this kind of telescope can only estimate the distance according to the formula, and it is normal for the estimated error to vary by tens of meters or hundreds of meters. Only the second type is called a true range-finding telescope, so another alias for the range-finding telescope is a rangefinder telescope. The ranging telescope is a kind of laser rangefinder, or a long-distance laser rangefinder. The measuring distance of the ranging telescope is generally 400-3000meters.
As the name suggests, the ranging telescope is also a telescope, but it is a telescope with a laser ranging. Therefore, ranging telescopes are divided into monocular ranging telescopes and binocular ranging telescopes.
The general price of a monocular ranging telescope is dozens to hundreds of dollars. The general price of binoculars ranging telescopes is thousands of dolloars and above.
Understand several important parameters of the ranging telescope:
Measuring distance: This is the main index of the ranging telescope. Only the farthest distance the telescope can measure. The measuring distance of the telescope is generally 400-3000 meters. This distance refers to the straight-line distance from the measuring position to the measuring target. There is another important indicator later, which is the horizontal distance (these two concepts must not be confused). The measurement distance of the ranging telescope is generally the theoretical measurement distance, which will be affected by the weather. Therefore, when you choose a rangefinder, in principle, you should choose a rangefinder telescope that is about 20% farther than the farthest measurement distance you actually require.
2.Measurement accuracy: refers to the measurement accuracy range of the ranging telescope. The measurement accuracy of the ranging telescope on the market is generally 1 meter, and the measurement accuracy of some high-precision ranging telescopes can reach 0.2 meters.
Whether it can measure height: whether it can measure the horizontal height, many rangefinders have this function, so this kind of rangefinder can also be called an altimeter. Another concept of height measurement is to measure the absolute height of the target. These two concepts must not be confused.
Can you measure angles: Can you measure angles? Also, many rangefinders have this function, so this kind of rangefinder can also be called a goniometer.
Can the absolute height of the target be measured: It is different from the concept of height measurement mentioned above, it refers to the height of the target itself, which is a function only of high-end range finders.
Can the horizontal distance be measured: The measurement distance mentioned above refers to the straight-line distance from the measurement position to the measurement target, while the horizontal distance refers to the horizontal distance from the measurement position to the measurement target. These two distances are not the same. This is a feature only available on high-end rangefinders.
Can continuous ranging: Continuous ranging is very useful in many situations, so this function is also very important.
Can the angle be measured continuously: the function of continuous angle measurement is available on some high-end ranging telescopes.
After understanding the above 8 important functional parameters of the range-finding telescope, you can choose according to your needs, because the range-finding telescope is a measurement tool, and it is recommended that you choose a range-finding telescope with full functions if economic conditions permit， so as to meet your use in various working situations.
Second, the ranging principle of the ranging telescope
---U-shaped line ranging method
Among them, the 10×40 U-shaped ranging line can directly read the distance. As shown in the left picture, it is the dividing line, and the one marked on the right is 1.75 meters, which is measured by the average height of the personnel. When observing, align the imaging feet of the personnel For the reference line below, the reading corresponding to the top of the head is the distance (meters. When measuring the distance of a farther object, use a 6-meter-high reference object to read from the left. If you measure a farther target, use a 6-meter-high reference object to read from the left. The reference object is read from the left. If there is no reference object of the appropriate length, the reading can be subjectively corrected according to experience. What about measuring a larger distance? Use a larger scale reference object such as a 30-meter-high building, and then when reading Multiply by the corresponding magnification.