Measurement for influence of aerosols on polarized sky radiance

CHU Jin-kui; WANG Wei; CUI Yan; ZHI Wei; GAO Qi-sheng

doi:10.3788/OPE.20122003.0520

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Measurement for influence of aerosols on polarized sky radiance

Article | 更新时间：2020-08-12

- Measurement for influence of aerosols on polarized sky radiance
- Optics and Precision Engineering Vol. 20, Issue 3, Pages: 520-526(2012)
- 作者机构：
  
  大连理工大学精密与特种加工教育部重点实验室, 辽宁大连 116024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122003.0520
  CLC： O436.3;P407.4
- Received：31 October 2011，
  
  Revised：30 December 2011，
  
  Published Online：22 March 2012，
  
  Published：22 March 2012
- 稿件说明：
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褚金奎, 王威, 崔岩, 支炜, 高启升. 气溶胶对天空偏振辐射影响的测量[J]. 光学精密工程, 2012,(3): 520-526

CHU Jin-kui, WANG Wei, CUI Yan, ZHI Wei, GAO Qi-sheng. Measurement for influence of aerosols on polarized sky radiance[J]. Editorial Office of Optics and Precision Engineering, 2012,(3): 520-526
褚金奎, 王威, 崔岩, 支炜, 高启升. 气溶胶对天空偏振辐射影响的测量[J]. 光学精密工程, 2012,(3): 520-526 DOI： 10.3788/OPE.20122003.0520.

CHU Jin-kui, WANG Wei, CUI Yan, ZHI Wei, GAO Qi-sheng. Measurement for influence of aerosols on polarized sky radiance[J]. Editorial Office of Optics and Precision Engineering, 2012,(3): 520-526 DOI： 10.3788/OPE.20122003.0520.

摘要

研究了气溶胶光学特性对天空偏振辐射的影响以获得实际的天空偏振分布模式。采用自主搭建的天空偏振辐射测量系统

于不同日期、同一地点在太阳子午面内进行了若干实验

分别测量了太阳高度角约为60时

435~465 nm

535~565 nm

685~715 nm 3个波段光在散射角为90时对应的偏振度和辐射强度。用大气压强、能见度等参数进行理论计算获得了气溶胶光学厚度。当气溶胶光学厚度在0.2~0.55间逐渐增大时

3个波段对应的最大偏振度分别从43%减小到22%、从41%减小到21%、从38%减小到19%

而对应的辐射量不断增大。实验结果表明:随着气溶胶光学厚度的增大

偏振度不断减小

尤其是对长波长

偏振度的衰减更明显

从而不利于偏振光导航。

Abstract

The influence of the optical properties of aerosols on polarized sky radiance was researched to obtain the actual polarized sky radiance distribution model. Using the polarized sky radiance measuring system set up by ourselves

a lot of experiments were done at the same place but different dates. The degree of polarization and polarized sky radiation were acquired through these measurements in the solar altitude angle about 60? and the scattering of 90? for three wave bands of 435-465 nm

535-565 nm and 685-715 nm. The aerosol optical depth was calculated by theory formula according to atmospheric pressure and visibility. When the aerosol optical depth increases from 0.2 to 0.55

the degrees of polarization for the three different wave bands decrease separately from 43% to 22%

41% to 21% and 38% to 19%

but the radiation shows a trend of increase. Experimental results indicate that as the increase of aerosol optical depth

the degree of polarization will decrease

especially more significantly reduction for the longer wavelength. Therefore

the increase of aerosol optical depth is not conducive for the navigation according to polarized light.

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Keywords

references

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