利用辐射光实现超分辨经典分辨极限的成像研究
文献类型：学位论文
| 作者 | 步扬 |
| 学位类别 | 硕士 |
| 答辩日期 | 1999 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 王桂英 |
| 关键词 | 光学超分辨 变迹术 共焦扫描术 分辨率 衍射受限系统 |
| 中文摘要 | 对微观结构体系的无尽探索使得对仪器的分辨率要求也越来越高。提高物体分辨率的方法已经做了很多的研究。其中，利用光学系统的优势实现超经典衍射分辨率极限一直是光学工作者所追求的目标。目前的光学方法可以满足对光学检测系统纵向检测分辨(亚纳米级)的要求，然而，光学系统的横向分辨率却一直未能达到和满足现代检测(深亚微米级－小于0.5微米)的需要。本文就此对提高光学检测系统分辨率的相关技术和方法进行了初步的理论研究和实验工作。本文主要有两部分组成。第一部分主要阐述了成像系统分辨率的相关概念，基本理论，以及超高光学分辨率的相关研究。第二部分重点对超高光学分辨率中的两个途径分支——变迹术与共焦技术以及它们之间的结合进行了理论和实验研究。本文的主要内容如下：1)第一章首先给出了图像的基本概念与分类，进行了成像分辨率、超经典衍射分辨率的讨论。其次论述了超高光学分辨率的相关研究，给出了获得超高光学分辨率的技术和方法。最后，论述了变迹术和共焦技术的发展状况。2)第二章首先给出了线性系统的一些基本性质，包括空间带宽积、自由度、测不准关系。然后从与传统的物理光学领域不同的角度，在线性时间不变滤波器理论的基本框架内表述了标量衍射理论。3)第三章首先介绍变迹术的理论基础和利用变迹术来实现超分辨的相关思想。其中重点阐述了Frieden提出的扁长球函数理论。然后针对其不足之处，提出了基于变距圆光栅函数来制作光瞳掩模的思想，建立了相关的数学模型，并进行了模拟计算。在数值进行优化的基础上，给出了模拟计算结果。4)第四章首先阐述共焦技术的理论基础，然后从理论上探讨了变迹术和共焦技术相结合提高成像分辨率的可行性，最后，本章给出了共焦技术和变迹术相结合以及其在成像系统上的实验结果。5)第五章在本文所阐述的基本理论和相关概念的基础上，对本论文进行的各项工作进行小结。分析了现存的一些问题，并为进一步的发展提出了设想。 |
| 英文摘要 | The unlimited image is coming into being because the modern science and technology development. The infinite explorations to microcosmic structure make the demands of instruments' resolution higher and higher. The kinds of ways to improve resolution have been invested. Among these, using optic system to realize superresolution has many advantages. At present, optical methods can only satisfy the demands of axial detection resolution (sub-nanometer). And NOT satisfy the transverse resolution demands (sub-micronmeter). Preliminary theory and experiments are further carried out in this thesis. This dissertation is composed of two parts. Part I is about the concepts, theories and discusses of image and super optic resolution. In part II, the two branch -- apodization and confocalization -- are investigated. The contents of the thesis is as follows: 1) This chapter first presents concepts and classification of the image, the relation between resolution and information theory, decision theory. Then a review of correlative research of superresolution is expounded. The developments and current status about apodization and confocalization are outlined in the end. 2) The fundamental nature including spatial bandwidth, the degrees of freedom, uncertainty relation in the linear system are presented first. Then expounding the scalar diffraction theory with the framework like linear invariability filter theory. 3) In the third chapter the theory, main developments and superresolution about apodization technology were explained. The Frieden's prolate function theory is also stressed. On the theory analysis, the pupil based on circle grating function with different space has been designed and the weight coefficients have been optimized. The results of computer simulation are presented in the chapter. 4) A review about the theory basement of confocal system was given. Then the discuss for the probability to improve resolution through apodization in the confocal scanning system was presented. In the end the experiment results were described. 5) Based on the fundamental theory and relative concepts, the works of this thesis are summarized. Then analyzing the current status and existing problems. Some new ideas are submitted. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16580]  |
| 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 | 步扬. 利用辐射光实现超分辨经典分辨极限的成像研究[D]. 中国科学院上海光学精密机械研究所. 1999. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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