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Laser line transmittance extracting method based on direct radiation of sun wide spectrum

A radiometer and transmittance technology, which is applied in the field of solar laser spectral line transmittance extraction, can solve the problems of high cost and low real-time performance of atmospheric transmittance

Active Publication Date: 2016-07-20
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for extracting laser spectral line transmittance based on solar broad-spectrum direct radiation, so as to solve the problem of high cost or real-time performance of laser band atmospheric transmittance obtained by the prior art laser radar and atmospheric optical transmittance software package low problem

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  • Laser line transmittance extracting method based on direct radiation of sun wide spectrum
  • Laser line transmittance extracting method based on direct radiation of sun wide spectrum
  • Laser line transmittance extracting method based on direct radiation of sun wide spectrum

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Embodiment Construction

[0076] Such as figure 2 , image 3 shown. The method of extracting the transmittance of the laser spectral line based on the sun's broad-spectrum direct radiation includes an extrapolation method to extract the laser spectral line transmittance and an actual measurement method to extract the laser spectral line transmittance.

[0077] The extrapolation method extracts the transmittance of the laser spectral line, which specifically includes the following steps:

[0078] (1) Choose fine weather to calibrate the 0.4, 0.5, 0.675, 0.87, 0.94, 1.02, and 1.63 μm bands of the existing Japanese POM02 solar radiometer in the laboratory using the Langley method and the improved Langley method to obtain calibration values ​​for each band. scalar value V 0 (λ); and carry out experimental measurements to obtain 0.4, 0.5, 0.675, 0.87, 0.94, 1.02, 1.63 μm band solar broad-spectrum direct radiation V (λ);

[0079](2) Using the measured six-band solar broad-spectrum direct radiation of 0....

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Abstract

The invention discloses a laser line transmittance extracting method based on direct radiation of a sun wide spectrum. Generally, a laser line transmittance is extracted through an extrapolation method, or the laser line transmittance is extracted through a field measuring method. The method of the invention can measure and extract the laser line transmittance based on direct radiation of the sun wide spectrum. The invention provides two methods which are low in cost and capable of obtaining atmospheric transmittances of various laser wavebands in real time. The methods can overcome defects of acquiring the laser waveband atmospheric transmittance through an atmospheric optic transmittance software package and a laser radar. The laser waveband transmittance obtained through the method can be applied to laser atmospheric transmission correction and has important significance in evaluating laser ranging, laser communication, laser transmission and laser guidance.

Description

technical field [0001] The invention relates to the field of methods for extracting solar laser spectral line transmittance, in particular to a method for extracting laser spectral line transmittance based on solar broad-spectrum direct radiation. Background technique [0002] When the laser of any wavelength is transmitted in the atmosphere, the intensity will be attenuated due to the absorption and scattering of molecules and aerosols in the atmosphere. This attenuation can directly affect its application in laser detection, laser guidance, laser ranging, laser communication and other laser engineering Applications. The transmission of laser in the atmosphere is usually expressed by atmospheric transmission characteristics. Atmospheric transmittance is an important parameter for these laser engineering applications and the evaluation of laser atmospheric transmission. Understanding and mastering laser atmospheric transmittance is not only of important academic value, but a...

Claims

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Application Information

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IPC IPC(8): G01N21/59
CPCG01N21/59
Inventor 李建玉徐文清朱文越黄宏华詹杰钱仙妹魏合理饶瑞中
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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