摘要傅里叶变换高光谱成像仪与其他光谱成像方法相比有很多优点，比如光谱分辨率更高、自由光谱范围更宽、在低光通量的情况下能实现更高的信噪比等。目前国际上已经提出由两个相同Wollaston棱镜组成干涉仪的方法，但该方法得到的干涉图像对比度不高、移动镜扫描偏差大，为了解决这些问题本论文提出一种新的高光谱成像方法。该方法的核心思想是采用角锥取代其中一个Wollaston棱镜来构成光束剪切器。73649

本文首先研究了双折射偏振干涉高光谱成像仪的基本原理，并进一步研究其光束剪切的原理及光束扫描的原理。其次给出光束剪切器中光程差的完整计算公式，并用MATLAB编程软件对公式进行分析。最后搭建实验装置验证了本文高光谱成像方法的可行性。研究表明，基于双折射偏振干涉的高光谱成像系统具有高光谱分辨率、高空间分辨率、高通量的优点。

毕业论文关键词  高光谱成像 偏振干涉 双折射 双光束剪切 傅里叶变换

毕业设计说明书外文摘要

Title   Research on hyperspectral imaging based on birefringence  polarization interferences

Abstract  Fourier-transform imaging spectrometers offer important advantages over other spectral imaging methods , such as higher spectral resolutions, wider free spectral range, and higher signal-to-noise ratios in low-photon-flux。 It had presented a kind of interferometer that composed of two identical Wollaston prism, however, the contrast of the interference image obtained by the method is not high and the deviation of moving mirror is large。 To solve these problems, a new method of hyperspectral imaging is proposed in this paper。 The core idea of the method is replacing a pyramid with one of a Wollaston prism to form a beam splitter。

In this paper, the basic principle of the birefringence polarization interference imaging spectrometer is researched firstly, and then the principle of the beam shearing and the principle of the beam scanning is studied。 After that, the calculating formula of the beam splitter’s path difference is given, and it is analyzed by MATLAB。 Finally, an  experimental facilities is built to verify the feasibility of this method。 The research shows that the hyperspectral imaging system based on birefringence polarization interference has the advantages of high spectral resolution, high spatial resolution and high throughput。

Keywords  hyperspectral imaging, polarization interference, birefringence, double-beam shear,  Fourier-transform

目   次

1 绪 论 1

1。1 课题研究的背景和意义 1

1。2 国内外研究现状 2

1。3 论文的主要研究内容 3

2 双折射偏振干涉高光谱成像的基本原理 5

2。1 双折射干涉技术原理 5

2。2 双折射偏振干涉高光谱成像原理 9

3 系统分析与设计 13

3。1 光程差的计算过程 13

3。2 对光程差的分析 17

4 实验验证与分析 19

4。1 实验装置 19

4。2 实验结果及分析 21

结  论 23

致  谢 25

参考文献 26