Method for measuring atmospheric coherence length of mobile beacon

Abstract

The invention discloses a device and a method for measuring the atmospheric coherence length of a mobile beacon. The device consists of a beacon light source, a light source carrier, a receiving telescope, a rotating cloud deck, a subsequent imaging system, an analog or digital CCD camera and a computer, wherein the beacon light source is fixed on the light source carrier to move during measurement; light emitted from the light source passes through the turbulent atmosphere to form two faculae vertically arrayed on a target face of the analog or digital CCD camera through the receiving telescope and the subsequent imaging system; converted digital images are sent to the computer for processing; and according to the data processing results, the computer controls the analog or digital CCD camera to change parameters, automatically adjust image qualities and perform the identification and extraction of targets so as to measure the atmospheric coherence length. The device and the method have the advantages of greatly expanding the working range of an atmospheric coherence length meter, effectively reducing errors caused by different levels of operators, achieving more real and reliable measurement results and greatly improving the properties of the atmospheric coherence length meter.

Description

Technical field [0001] The invention relates to the field of atmospheric optics, in particular to an instrument and a measuring method capable of quickly automatically tracking and measuring the atmospheric coherence length value of the light wave of a mobile beacon on its propagation path in real time. Background technique [0002] The large gas coherence length can describe the comprehensive turbulence intensity of light waves in the atmospheric transmission path. Therefore, it is often used as a very important calibration parameter in application fields such as astronomical observatory site selection, laser atmospheric transmission, and adaptive optics research. [0003] In practical applications, certain areas of atmospheric optics not only need to obtain the coherence length value of the entire atmosphere and the fixed path of the slope, but also need to determine the atmospheric coherence length of the light wave propagation path between the moving target and the measurement ...

AI Technical Summary

Problems solved by technology

[0004] The current atmospheric coherence length measurement devices all use stationary (fixed iodine-tungsten lamp) or near-stationary (iodine-tungsten lamp on a tethered balloon, fixed sun) target as the light source for measurement, and use manual fine-tuning to align the telescope at the target, but In some applications, the light source needs to be fixed on a fast-moving carrier such as a vehicle or a drone for measurement. This type of light source is characterized by fast movement and complex background changes. The existing atmospheric coherence length that relies on manual adjustment The instrument can no longer meet the needs, which also puts forward higher requirements for the atmospheric coherence length measurement instrument and measurement method

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