光信息科学与技术毕业论文.doc

摘要济 宁 学 院 本科毕业论文光的干涉及其应用李阳2009020126专 业 名 称 光信息科学与技术 申请学士学位所属学科 理 科 指导教师姓名、职称 讲师 2012年 05月 30日II 摘 要 光的很多性质都在人们的生活、生产中有着重要的作用，提到光的干涉不难联想到风靡全球的3D电影，也不难想到全息干涉技术因为它就是利用了光的干涉来记录图像信息的全息干涉技术可做到全场、定量、直观的无损检测，是现代光学检测计量的重要手段之一，在科学研究、工业检测、生物医疗及国防军事技术等领域具有广泛的应用全息记录介质是决定全息干涉系统性能极其应用范围的主要因素传统全息记录介质需要化学显影、定影处理，需要精准复位调整，无法做到实时处理，且不能重复使用相比之下光折变晶体作为全系干涉的记录介质则有其明显的优点采用此介质可充分发挥全息干涉与光折变晶体两方面的优点，可大大提高全息干涉系统的实时性、灵活性选用新的光折变晶体，采用新的系统结构和技术，探索新的应用领域，从理论与实践两个方面进一步深化光折变全息干涉技术的研究，是十分必要的。

本论文的研究工作，从理论与实践两方面对光折变全息干涉技术进行了深入的研究，系统的研究了光折变全息干涉条纹衬比度的时间变化特性，提出了一系列新技术、新方法，并探索了光折变全系干涉新的应用领域关键词：光的干涉、全息干涉技术、光折变晶体、条纹衬比度 Abstract Many of the properties of light plays an important role in the life of people and production. Mention of light interference is not difficult to associate 3D popular global film ,and not difficult to think of holographic interferometry(HI).Because it is the use of the light interference to recording image information.Holographic interferometry ,witch permits whole-field and nondestructive optical testing,is one of the most powerful means of modern measurement and metrology techniques.It is employed in numerous scientific,technical,industrial,engineering and medical applications.The holographic recording medium is decided by holographic interferometry system performance and its application scope of main factors.For the purpose of realtime holography and thermoplastic materials.However ,the former is not recyclable and usually needs post-processing of uniform exposure to make its refractive index modulation stable ,while the latter suffers from the limited spatial resolution and the cumbersomeness of operation.Compared with the classical recording materials mentioned above ,photorefractive crystals(PRCs) have been under extensive studies in recent decades and considered as promising holographic recording materials in HI owing to their high resolution,adequate sensitivity which is controllable by changing their compositions,large storage capacity,realtime processing ability and excellent reusability .It is very necessary which selection of a new photorefractive crystal,and the new system structure and technology.explore new areas of application,research the photorefractive holographic interference technique from the theory and practice. The aim of the presented dissertation is to construct a realtime PHI system with proper doped Ce:SBN under low power He-Ne laser light ,give a systematic and comprehensive analysis on it ,and study its new techniques,new methods and new applications in optical testing and image processing,theoretically and experimentally. Key Words: Interferometry of light , Holographic interference technique ,Photorefractive crystals , Fringes contrast 目录1. 引言 ...........................................................1 1.1光折变全息干涉简介及研究现状..................................l 1.2 研究意义及目的...............................................3 1.3 研究内容及创新...............................................5 1.3.1 研究内容.................................................5 1.3.2 研究工作的创新点.........................................7 2. 光折变全息记录与再现的物理机理与特性...........................12 2.2 光折变全息记录与再现的物理理...............................13 2.4 光折变晶体全息记录与再现的特性数...........................25 2.4.1 光谱响应................................................26 2.4.2 响应时间与存储时间.....................................．27 2.4.3 灵敏度..................................................27 2.4.4 动态范围................................................28 2.4.5 散射噪声及晶体光学质量..................................28 2.4.6 空间频率响应（空间分辨率）..............................29 2.5 光折变晶体材料简介..........................................293. 掺铈铌酸锶钡（Ce：SBN）晶体及其全息记录特性....................33 3.1 SBN 晶体的结构..............................................33 3.3 SBN 晶体基本的物质性质、光学性质及光折质.................35 3.4 Ce：SBN 晶体全息记录特性测量................................37 3.3.1 光谱响应...............................................37 3.3.2 全息记录衍射效率.......................................37 3.3.3 全息记录、擦除时间.....................................404. 光折变全息干涉及其应用研究.....................................42 4.1 全息干涉的基本原理与方法....................................42 4.2 光折变全息干涉的基本原理....................................47 4.2.1 单次曝光光折变全息干涉.................................48 4.2.2 两次曝光光折变全息干涉.................................49 4.3 光折变全息干涉条纹衬比度的时间变化特性......................49 4.3.1 单次曝光全息干涉条纹衬比度及最佳观测时间...............51 4.3.2 两次曝光全息干涉条纹衬比度及最佳观测时间...............59 4.4 光折变全息干涉实验装置及试验参数............................61 4.5 用光折变全息干涉测量三维轴对称折射率分布....................63 5 光折变波面平移全息干涉技术及其应用研究.........................74 5.1 光折变波面平移全息干涉.........。