空间调制光谱偏振测量技术研究

发布时间：2018-01-03 02:11

  本文关键词：空间调制光谱偏振测量技术研究　出处：《中国科学技术大学》2017年硕士论文　论文类型：学位论文

  更多相关文章： 偏振 空间调制 误差分析 实验研究

【摘要】：光谱偏振探测技术是一种融合偏振技术和光谱技术的新型遥感探测技术,可以获取目标光学辐射的偏振度、偏振角、偏振椭率、光谱等多维信息。近些年来,此技术在天文观测、目标识别以及医学诊断等领域的应用得到了快速发展,研究和发展光谱偏振探测技术,对遥感探测有重要意义。本论文首先介绍偏振探测技术的研究背景以及偏振探测技术的主要应用领域,调研了国内外调制型偏振探测技术的发展状况,分析和讨论了偏振探测的相关理论,介绍了利用斯托克斯参量进行偏振测量的原理和几种常见调制类型的Stokes参量偏振测量方法,并描述了各自的优缺点;然后分析和讨论了基于复合光楔的空间振幅调制偏振光谱探测技术的相关理论,推导了基于单复合光楔和双复合光楔结构下的空间振幅调制偏振光谱探测技术的探测原理和测量方程,对双复合光楔结构形式进行了分析,筛选出较为理想的光楔结构模型;对空间调制光谱偏振测量系统中的关键偏振器件误差进行了研究,分析了关键误差因子对偏振测量的影响,针对复合光楔的中心误差提出了双光束测量的误差标定方法;最后对空间调制光谱偏振探测系统展开了实验研究,对单、双复合光楔结构形式进行实验研究,确定了后续实验采用的光楔结构形式;采用窄带滤光片和光谱定标光源相结合的方式对系统进行光谱定标实验,获取了分立光谱通道下不同入射偏振态条件下2D光谱偏振调制的图像数据,对图像原始数据进行解调,解调得到的偏振度测量精度分别为Q≤2.5%,U≤4.2%,V≤7.1%,解调结果与双复合光楔延迟器的轴心偏移误差造成不同参数之间的串扰理论分析结果吻合。
[Abstract]:Spectral polarization detection technology is a new remote sensing technology combining polarization technology and spectral technology. It can obtain the polarization degree, polarization angle, polarization ellipticity, spectrum and other multi-dimensional information of the target optical radiation in recent years. The application of this technique in astronomical observation, target recognition and medical diagnosis has been rapidly developed, and spectral polarization detection technology has been studied and developed. This paper first introduces the research background of polarization detection technology and the main application fields of polarization detection technology, and investigates the development of modulation polarization detection technology at home and abroad. The related theory of polarization detection is analyzed and discussed. The principle of polarization measurement using Stokes parameter and several common modulation methods of polarization measurement of Stokes parameters are introduced. Their advantages and disadvantages are described. Then the theory of spatial amplitude modulation polarization spectrum detection based on composite wedge is analyzed and discussed. The detection principle and measurement equation of the spatial amplitude modulation polarization spectrum detection technique based on the single and double composite wedge structures are derived and the structure forms of the double composite optical wedges are analyzed. The ideal wedge structure model is selected. The key polarization device errors in the spatial modulation spectral polarization measurement system are studied, and the influence of the key error factors on the polarization measurement is analyzed. An error calibration method for double beam measurement is proposed for the center error of composite wedge. Finally, the spatial modulation spectral polarization detection system is studied experimentally, and the structure of single and double composite optical wedges is studied, and the structure of optical wedge used in subsequent experiments is determined. The spectral calibration experiment was carried out by combining narrow band filter and spectral calibration light source. The image data of 2D spectral polarization modulation under different incident polarization state in discrete spectral channel were obtained. The demodulation of the original image data shows that the measurement accuracy of polarization degree is Q 鈮，

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