1. Adjust the eye distance.
First, adjust the positive and negative diopter scales of the left and right eyepieces of the military telescope to 0 scale. Hold the left and right mirror bodies of the telescope with both hands, search for distant targets, and stretch or press the left and right mirror bodies at the same time. When the eye distance of the military telescope is the same as the pupil distance of the human eye (the full field of view seen by the human eye is circular), stop adjusting.
2. Adjust the image.
First search for the target, lock the target, turn the left eyepiece diopter handwheel, make the target image and the graticule image of the left branch system of the telescope completely clear, and then turn the right eyepiece diopter handwheel to make the target image of the right branch system completely clear, and then complete the adjustment of the observed target. Because the optical path design of the military telescope has a dynamic automatic focusing function, when the clarity of the telescope is adjusted, there is no need to refocus when observing targets at different distances again.
3. Measure the direction angle.
The direction angle refers to the angle between the two targets to be measured (or the two ends of a target in the horizontal direction) and the telescope on the horizontal plane.
a) When the azimuth angle of the two targets is smaller than the azimuth angle measurement scale range in the telescope, align the scale line at one end of the scale plate with the target (target 1), and then look at the value of the azimuth angle of the other target (target 2) aligned with the scale line, which is the measured azimuth angle digit.
b) When the azimuth angle of the two targets is larger than the azimuth angle measurement scale in the telescope, you can use any target (target 3) between the two targets (target 1, 2) to perform segmented measurement, and add up the values measured in each segment to get the measured azimuth angle. The measured azimuth angle is 1-10 (110 digits)
4. Measure the elevation angle.
The angle between any two targets (or the two ends of a target) and the telescope on the vertical plane is called the elevation angle.
a) When the target's elevation angle is relatively small, align the cross center of the reticle (or any scale line) with the target's bottom, and look at the scale value between the corresponding scale line above the target, which is the number of digits of the measured elevation angle. As shown in the figure, the target's elevation angle is 0-15 (15 digits).
b) When the target's elevation angle is relatively large, the segmented measurement method can be used, and the segmented measurement values can be added together to obtain the elevation angle.
5. Distance measurement.
Distance measurement using the sight line curve
a) When the target height is 2m, align the lower end of the target with the horizontal line of the sight line scale, and the reading at the point where the upper end of the target is tangent to the sight line scale is the distance between the target and the observer. As shown in the figure, the distance between the target and the observer is 550m.
b) When the height of the target is greater than (or less than) 2m, the actual distance is calculated as follows:
L=L1xH/2(m)
Where: L---------Actual distance from observer to target (m)
L1-------Measured distance from observer to target (m) (measured using the sight distance scale and method with a target height of 2m)
H--------Target height (m)
Use the mil formula to calculate the distance
Mil formula: L=1000xH/a
Where: L--------Distance from observer to target (m)
H--------Height or width of target (m)
a---------Target elevation angle or target direction angle measured by telescope graticule (mil)
6. Use telescope at night.
When the ambient light is dim or when observing at night, it is recommended to use a telescope with an exit pupil diameter of more than 7mm. Because the pupil diameter of the human eye is about 2-3mm in daytime and about 6-7mm in darkness, the telescope can collect more light than the naked eye.
About us
Onick Optics (Wuhan) Co., Ltd. is a technology company dedicated to instruments and meters, optical instruments, electronic instruments, telescopes, night vision devices, car intercoms, digital photo recorders, uncooled thermal imaging and other products. It focuses on the research and development, production and sales of various instruments and meters, optical instruments, instruments and meters, optical instruments, electronic instruments, telescopes, night vision devices, speedometers, digital photo recorders, uncooled infrared thermal imaging and other products, and provides safe and reliable after-sales maintenance services.