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生物能够进行偏振光导航定位,一方面是其本身具有对太阳光偏振方向极其敏感的视觉神经系统,另一方面是天空中存在一个可供感知的大气偏振光模式图。天空偏振光分布受观测波段、天气条件以及太阳高度等因子的影响,使大气偏振光模式图具有不稳定性,从而降低了偏振光导航的适用性。着力研究这些影响因子与天空偏振光分布之间的关系,利用全天空偏振测量方法,系统地对全波段以及红、蓝、紫3个波段的天空偏振光在不同天气条件下的分布进行了实验研究。研究结果系统地反映了观测波段、天气条件、太阳高度对天空偏振光分布的影响,表明在不同天气条件下不同波段天空偏振度分布有差异,且蓝波段更适合用于偏振光导航的探测波段。本研究为提高偏振导航的精度及实用化提供理论基础,也为大气的偏振遥感探测提供参考。
Organisms can carry out polarized light navigation and positioning. On the one hand, they have a visual nervous system that is extremely sensitive to the polarization direction of sunlight and on the other hand, there is a visible atmospheric polarization pattern in the sky. The distribution of sky polarized light is affected by factors such as the observed wave band, weather conditions and the sun’s height, which makes the atmospheric polarization mode diagram unstable and reduces the applicability of polarized light navigation. Focusing on the relationship between these influencing factors and the distribution of sky polarized light, the distribution of sky polarized light in the whole wavelength band, red, blue and purple bands in different weather conditions has been systematically studied by using the full sky polarization measurement method the study. The results of the study systematically reflect the influence of the observed waveband, the weather conditions and the solar altitude on the distribution of sky polarized light, indicating that there are differences in the sky polarization distribution in different wavebands under different weather conditions, and the blue waveband is more suitable for the detection band of polarized light navigation . This study provides a theoretical basis for improving the accuracy and practicality of polarization navigation, and also provides a reference for the detection of atmospheric polarization remote sensing.