The polarization grade of three lamps for the laboratory and the polarization error of two illuminance meters are measured 測量了實驗室用的三支燈的偏振度及兩臺照度計的偏振誤差。
The relationship between the thermal emission polarization and viewing angles in metal targets is studied by using this thermal imaging polarimeter 利用該系統(tǒng),研究了金屬板熱紅外偏振度和觀測角之間的關系。
The polarization degree of metal plate surface increases with the viewing angle , when the viewing angle is larger than 20 degree 在觀測角大于20時,隨著觀測角度的增大,金屬目標板熱紅外偏振度的數(shù)值也增大。
The measuring results evince the polarization grade of the source is 10 % at most , and the meters are not polarization sensitive to normal incidence 測量結果表明,光源偏振度均小于10 % ,當光垂直入射時對照度計的影響是非常小的。
Using the degree of depolarization , cause of depolarization was discussed , and the droplet can be viewed as a sphericity in the lighter fog 由退偏振度隨霧濃度的變化討論了退偏產(chǎn)生的原因,指出霧濃度較低時,霧滴可近似視為球形。
The experiment results show that the polarization degree of metal plate surface has no direct relation with the temperature of the metal plate surface 實驗結果表明,金屬目標板熱紅外偏振度和其自身的熱輻射亮溫值沒有直接的關系。
Abstract : the measurement method of the polarization grade for the source and depolarization and the concept of the polarization error for the illuminance meter are described 文摘:介紹了光源偏振度的測量和消偏振的方法以及照度計偏振誤差的概念。
However , the relationship between the thermal emission polarization degree of metal plate surface and viewing angle of the detector does not obey the rule , when the viewing angle is smaller than 20 degree 但在觀測角小于20時測量,金屬目標板熱紅外偏振度和觀測角之間的關系并不遵循上述原則。
It is shown that the aperture affects the polarization and irradiance distributions of pgsm beams , and that the change of degree of polarization is not monotonous with the change of truncation parameter 光闌衍射影響著pgsm光束的偏振和光強分布, pgsm光束的偏振度隨截斷參數(shù)的變化不是單調變化。
A monte carlo algorithm was presented to model the relation between the scattering phenomenon , depolarization changes and sea water depth , it is discovered that the radius of scattering point and the degree of depolarization increase with increasing of the sea water depth . at last , a optical engineering software ( lighttools ) is introduced to simulate optical scattering in the deep sea water , and studys the corelation between scattering and relative refractive index , particle density and particle size in the sea water . the experiment results show that the intensity of scattering will increase evidently with the increasing of particle size , particle density and relative refractive index . the methods and results in the article provide the basic theory and experiment validation for improving performance of communication , detection and imaging under sea water 本文以球形粒子的mie散射理論、 stokes矢量法以及mueller矩陣來研究海水的散射特性和散射中的退偏振度變化;通過montecarlo方法模擬藍綠激光在海水傳輸過程中的散射現(xiàn)象以及散射中的退偏度變化與海水深度的關系,發(fā)現(xiàn)隨著海水深度的增加,散射后的光斑半徑、退偏振度將逐漸增大。最后通過光學工程軟件( lighttools )對海水中的散射進行仿真實驗,研究散射與海水中粒子密度、粒子大小和相對折射率的關系。實驗結果表明,隨著粒子半徑、粒子密度和相對折射率的增加,散射的強度將顯著增加。