无分束器鬼成像研究及其在遥感中的可能应用
文献类型：学位论文
| 作者 | 贺拾贝 |
| 学位类别 | 硕士 |
| 答辩日期 | 2010 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 韩申生 |
| 关键词 | 遥感 鬼成像 无分束器 光外差 太阳光谱 |
| 其他题名 | The possible application of ghost imaging in remote sensing |
| 中文摘要 | 遥感是一项成熟的对地观测综合性技术，它通过对物体发出的或反射的电磁波谱的获取和分析，提取物体的信息。 鬼成像是上世纪90年代才发展起来的利用光场二阶相关性进行成像的一种新的成像方式。在鬼成像的发展过程中，我们发现，鬼成像在 遥感这门技术中的应用－利用自然光进行鬼成像遥感－有非常巨大的潜力。要实现这个目标，首先必须实现热光场无分束器的鬼成像，本文就围绕这个课题展开。 本论文主要包括四个部分： 第一章首先介绍了遥感。阐述了遥感的原理和遥感系统，介绍了遥感的特点和遥感分类。接着介绍了鬼成像。从鬼成像的理论起源开始，重点介绍了 纠缠光的鬼成像，赝热光的鬼成像和真实热光的鬼成像。我们指出，双光子干涉是鬼成像的根本机理，并且利用一个统一的理论模型－密度矩阵－解释了 纠缠光鬼成像和热光场鬼成像。最后，我们阐述了鬼成像在遥感技术中的可能应用。 在本章中，我们首先介绍了赝热光和真实热光场的光场统计特性。然后重点介绍了无分束器鬼成像傅立叶谱的实现。我们对赝热光源面进行 强度调制，利用成像系统做出了双缝的傅立叶谱。通过理论上的分析，我们得出结论，这个实验利用的是光场的纯近场关联。在本文的 最后部分，我们介绍了太阳光谱的特征，指出了本实验装置应用到自然光的可能性，并且改进了实验装置，利用光场变换使之能更广泛的 应用于实际。 本章介绍了利用光外差的方法实现热光场无分束器成实像的数值模拟。这种方法的核心是对光源面上的独立子光源进行相位恢复，理论基础是 球面波理论。本章给出了各光学元件和光学过程在MatLab中的具体实现方法，并给出了实验结果。从数学上来说，这个模拟的实质是单次方程组 的求根。需要至少不少于光源独立子光源个数的感光基元，才能实现成实像的目的。 最后一章展望了鬼成像在遥感中的应用前景，并且指出了在理论研究中，我们亟需努力提高和改进的地方。 |
| 英文摘要 | Remote Sensing is a highly developed synthetical technique of observation to ground. It obtains the information of the object through detecting and analyzing the spectrum of electrical wave which is emitted or reflected by the target. Ghost imaging is a new imaging method by utilizing the second-order correlation of the light field，which just originated from 90s in 20th century. In the progress of the research of the ghost imaging, we find a possible application of ghost imaging in remote sensing-realizing ghost imaging in remote sensing by natural light as light source-has a great potential. However, before the realization of this application, the first step we must take is to realize ghost imaging without beamsplitter, and this thesis is mainly about this subject. This thesis consists of four chapters: In the first chapter, we first introduce the mechanism, the system, the features and the classification of the remote sensing. Then, ghost imaging is also introduced. We begin with the theoretical origin of ghost imaging. And our emphasis lies in the entangled light ghost imaging, pseudo-thermal light ghost imaging and the most important one-the true-thermal light ghost imaging. We point out the basic principle of the ghost imaging-the interference of two photons. In succession, we explain the mechanism of both the entangled light and the pseudo-thermal light under one theoretical model-density matrix. Finally, the potential application of ghost imaging in remote sensing is discussed. In the second part, the statistical properties of pseudo-thermal light and true-thermal light is discussed. The main content is about ghost diffraction without beamsplitter. We generate intensity-modulation on the plane of pseudo-thermal light and use the image-system to achieve the diffraction image of the double-slit. Through the theoretical analysis, we conclude that it is the pure-near field correlation that works in our experiment. Finally, we introduce the properties of the Sun''s spectrum, and point out the possibility of our experiment to be applied in the natural thermal light situation. For that, a light field change is introduced to improve our model, which makes it to be more widely used. We use optical heterodyne technique to realize ghost imaging without beamsplitter (real image part) in simulation. The core of this method is recovery of the phase on the light source plane, which is based on the spherical wave theory. In this chapter, the realization of optical element and optical process are given, and the result of simulation is also presented. Mathematically, the essence of our simulation is finding roots of first degree system of equations. The least number of photosensitive elements we need is the number of the light source element on the natural thermal light plane to realize the simulation. In the last chapter, we forecast the prospect of the application of ghost imaging in remote sensing, and the improvement we should do in our future research. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16683]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 贺拾贝. 无分束器鬼成像研究及其在遥感中的可能应用[D]. 中国科学院上海光学精密机械研究所. 2010. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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