强度关联激光成像雷达测量矩阵及高效赝热光源研究
文献类型：学位论文
| 作者 | 崔丽君 |
| 学位类别 | 硕士 |
| 答辩日期 | 2013 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 徐文东 |
| 关键词 | 压缩感知强度关联成像 激光雷达 测量矩阵 赝热光源 迭代算法 |
| 其他题名 | Research on the measurement matrix and efficient pseudo-thermal light source of intensity correlated imaging lidar |
| 中文摘要 | 强度关联激光成像雷达是在强度关联成像技术上发展起来的一种新型激光成像雷达技术，其利用单点探测器实现面成像，并且可以突破瑞利衍射极限和奈奎斯特采样定律的限制，具有极其广阔的应用前景。本论文主要研究了强度关联激光成像雷达测量矩阵的特性对成像的影响，并且针对现有的不可预置毛玻璃式赝热光源的问题和限制，提出了一种基于定向散射相位板的新型高效赝热光源生成技术，以满足远距、大功率强度关联激光成像雷达系统的要求。本篇论文主要包括以下四部分的内容： 第一章首先介绍了强度关联激光成像雷达的理论基础——压缩感知强度关联成像理论。而后，介绍了强度关联激光成像雷达系统的结构以及发展现状，并分析了强度关联激光成像雷达与传统激光成像雷达相比的特点和优势。 第二章主要研究了强度关联激光成像雷达的测量矩阵（即散斑场）对成像的影响。首先数值模拟分析了散斑场的强度分布对成像的影响，然后模拟研究了对自然目标成像时，所需采样次数与散斑尺寸的关系以及采样次数与目标稀疏性的关系。最后给出并验证了具有灰度的自然目标图像的稀疏度计算公式。 第三章首先介绍了现有的两大类赝热光源：不可预置毛玻璃式赝热光源和可预置赝热光源，分析了两种赝热光源的优缺点。接着，我们提出了一种基于定向散射相位板的新型高效赝热光源技术，并且给出了最终实现方案。文中介绍了多种相位板生成的迭代算法，并结合实际情况和特点，选择合适的迭代算法对其修改，生成了满足需求的定向散射相位板。 第四章对本论文的主要研究工作及研究成果做了归纳和总结，并对强度关联激光成像雷达的应用做了展望。 |
| 英文摘要 | The intensity correlated imaging lidar is based on compressive sensing intensity correlated imaging technology, which can realize surface imaging with single point detector and break through the Rayleigh diffraction limit and Nyquist sampling theorem, and has a very broad application prospects. This paper mainly studies the effect of characteristics of the measurement matrix for imaging and puts forward a new efficient pseudo-thermal light source. This paper mainly includes the following four parts: The first chapter firstly introduces the compressive sensing intensity correlated imaging theory which is the theoretical basis of the intensity correlated lidar. Then introduces the intensity correlated lidar system structure and development, and analyses its characteristics and advantages compared with the traditional imaging lidar. The second chapter mainly studies the effect of the characteristics of the speckle field which is the measurement of the intensity correlated lidar. First is the numerical simulation analysis of the impact of the speckle intensity distribution on imaging. Then studies the relationship between the number of sampling times and the target sparsity and the relationship between the number of sampling times and the target sparsity. Finally verifies the calculation formula of the sparse of natural target with gray. The third chapter first introduces two kinds of pseudo-thermal light source. Then proposes a new efficient pseudo-thermal light source-directional scattering phase plate and presents the implementation scheme. Then introduces a variety of iterative algorithm. Finally, combined with our actual situation, chooses the appropriate iterative algorithm and generates the directional scattering phase plate we need. The fourth chapter firstly summarizes the main research work and results in this paper, and then the application of the intensity correlated imaging lidar is discussed. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16784]  |
| 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 | 崔丽君. 强度关联激光成像雷达测量矩阵及高效赝热光源研究[D]. 中国科学院上海光学精密机械研究所. 2013. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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