A device and method for real-time measurement of equi-halo angle with limited distance
A limited-distance, real-time measurement technology, applied to measuring devices, measuring angles, surveying and navigation, etc., can solve problems such as difficult operation, complex structure, and difficult evaluation of measurement accuracy, and achieve the effect of simple structure, practical convenience, and rich understanding
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[0048] Suppose the finite distance of turbulence to be measured is L=15km, and the point beacon used is wavelength λ 0 = Laser light at 532nm.
[0049] ①, Measuring device design. According to the condition D≈(λ 0 L) 0.5 , substitute L=15km, λ 0 =532nm, first select the sub-hole diameter D to be 9cm. by condition d 1 =1.2D,d 2 =2.3D, the distance can be d 2 The transverse dimension of the two holes of the PTZ is at least 3.3D=29.7cm, so the light aperture of the receiving telescope cannot be lower than this value. The telescopes under this caliber are basically cassette telescopes. Considering the obstruction of the central secondary mirror, the other sub-hole It can be placed arbitrarily in the annular light-transmitting part, as long as the center distance between this hole and any other hole satisfies d 1 = 1.2D. figure 2 An illustration of an example of a three-hole mask that meets the needs. Considering the light transmission of the sub-aperture and the portabi...
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