晴朗天气下满月月光偏振模式的研究

发布时间：2018-12-17 09:47

【摘要】：自然界中很多生物是利用天空光偏振模式进行导航的,这为仿生学的研究提供了借鉴,仿生偏振导航逐渐成为了导航领域研究的热点。白天太阳光偏振模式的研究已经取得了一些成绩,而对月光偏振模式的研究因昏暗的月光以及研究方法的匮乏一直难以取得一定的进展。为了完善月光偏振模式以及给研制仿生导航传感器提供实验基础,本文对晴朗天气下月光的偏振模式进行了研究。本文探究了天空光散射的基本理论,分析了月光的偏振特性；通过以月亮为观测天体的地平坐标系,对不同月亮高度角和方位角下的月光偏振模式建立了理论模型；研制了图像式天空光偏振模式测试仪器,并且对偏振模式测试仪器进行了标定；利用图像式天空光偏振模式测试仪器,分别对暮光偏振模式、夜间月光偏振模式和相同高度角下白天太阳光偏振模式进行测试。利用基于中性点及子午线的天空光偏振模式分析方法,对月光偏振模式进行了分析；月光偏振模式测试分布图分别与理论模型、太阳光偏振模式测试图进行对比,研究了月光偏振模式与理论模型、太阳光偏振模式的差异；分波段研究了月光偏振模式,探究了不同波段下月光偏振模式的规律。经过对比发现在晴朗天空下满月时,存在规律性的月光偏振模式,且与仿真结果基本一致,符合Rayleigh散射理论；当月亮高度角和太阳高度角相近时,其分布规律是相似的；光强值不改变天空光偏振模式分布规律以及偏振度的大小,月光偏振模式偏振度的值与相同高度角下太阳光偏振度的值大小相近；月光波长越短,其偏振模式偏振度越大；晴朗天气下满月夜间短波段更有利于偏振导航。
[Abstract]:In nature, many organisms use the polarization mode of sky light for navigation, which provides a reference for the study of bionics. Bionic polarization navigation has gradually become a hot spot in the field of navigation. Some achievements have been made in the study of the polarization mode of solar light during the day, but the study of the polarization mode of the moonlight has been difficult to make progress due to the dim moonlight and the lack of research methods. In order to perfect the polarization mode of moonlight and provide experimental basis for the development of bionic navigation sensor, the polarization mode of moonlight in clear weather is studied in this paper. In this paper, the basic theory of sky light scattering is explored, and the polarization characteristics of moonlight are analyzed, and the theoretical model of the polarization mode of moonlight at different moon height and azimuth is established by taking the moon as the ground plane coordinate system for observing celestial bodies. The polarization-mode testing instrument of image sky light is developed, and the polarization mode testing instrument is calibrated. The polarization mode of the twilight, the moonlight at night and the polarization mode of the sunlight at the same altitude were measured by using the image-type sky light polarization mode test instrument. The polarization mode of sky light based on neutral point and meridian is analyzed. Compared with the theoretical model and the test chart of the polarization mode of the solar light, the difference between the polarization mode of the moonlight and the theoretical model and the polarization mode of the solar light is studied. In this paper, the polarization mode of moonlight is studied, and the law of polarization mode of moonlight in different bands is studied. After comparison, it is found that there are regular moonlight polarization modes in a clear sky, which are consistent with the simulation results, and accord with the Rayleigh scattering theory, and the distribution law is similar when the moon height angle and the sun height angle are close to each other. The value of light intensity does not change the distribution of polarization mode and the degree of polarization of sky light. The value of polarization degree of moonlight polarization mode is similar to that of solar light at the same height angle, the shorter the wavelength of moonlight is, the greater the polarization degree of polarization mode is. In clear weather, the short band of full moon at night is more favorable for polarization navigation.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P128.4

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