基于二元光学的Christiansen滤波器的研究

【作者】 卢有雄；

【导师】 谢康；

【作者基本信息】 电子科技大学 ， 光学工程， 2010， 硕士

【摘要】 光滤波器的应用范围广泛,工程应用中有多种光滤波器可供选择。Christiansen滤波器作为其中一员,有其独有的特性。它具有广泛的材料可选择性和温度可调控的优点。二元光学是光学与微电子技术相互渗透、交叉而形成的一门前沿学科。近年来,二元光学元件越来越广泛地应用于现代光学系统中。它具有体积小、重量轻、易复制、造价低、衍射效率高、设计自由度大、材料可选性大、色散性能独特等优点。基于二元光学方法的Christiansen滤波器就是结合了二元光学和Christiansen滤波器的优点而提出的一种新的滤波器设计方案。本文基于二元光学方法,设计了可用于紫外光波段的Christiansen滤波器,并开发了用于此滤波器的精确温度控制系统。论文的主要工作有:1.分析了应用二元光学元件设计Christiansen滤波器的可行性,对其应用条件做了适当修改,提出了应用二元光学元件设计Christiansen滤波器的方法。2.从设计折射棱镜型、闪耀光栅型Christiansen滤波器入手,将连续相位面的折射棱镜和闪耀光栅二元化为二元阶梯结构,分析了对应二元光学元件的滤波特性。在此基础上,建立了任意相位二元光学元件型Christiansen滤波器模型,并分析了其性能。3.在求解任意相位二元光学元件表面阶梯结构的过程中,总结出应用遗传算法优化设计任意相位二元光学元件的步骤和方法。4.以所设计的任意相位二元光学元件型Christiansen滤波器为例,分析了不同折射率材料搭配和不同温度条件下Christiansen滤波器中心波长的变化情况,总结了变化规律,并提出了改变中心波长的两种手段。5.基于51单片机和LTC1923芯片,设计实现了用于Christiansen滤波器的精确温度控制系统。更多还原

【Abstract】 Optical filter has a wide range of applications. There are a variety of optical filters available in engineering applications. Christiansen filter as one of that has the unique characteristics of extensive material selectivity and temperature adjustability. Binary optics is a leading subject which is derived from optical and microelectronics. Binary optical elements which are more and more widely applied in modern optical systems have many advantages, such as small size, light weight, replicating easily, low cost, high diffraction efficiency, more design variables, wide range of optional materials, peculiar chromatic dispersion performances etc. The Christiansen filter based on binary optics is a new filter designing scheme, which combines the advantages of both binary optics and Christiansen filter. In this dissertation, we designed a Christiansen filter which can be used in the UV band, and developed an accurate temperature control system for it.Major content of the dissertation is as follow:1. The feasibility of designing a Christiansen filter was analyzed using binary optical elements. We made some appropriate changes of its application conditions, and then proposed a method of designing Christiansen filter using binary optical elements.2. Start with the designing of Christiansen filter using refraction prism and blazed grating, the continuous phase surface elements such as refraction prism and blazed grating were made to be binary ladder structure. After that, the characteristics of the corresponding binary optical elements of those filters were analyzed. On this basis, the model of binary optical elements Christiansen filter which has arbitrary phase-type has be established, then its performance was analyzed.3. In the process of solving the surface of arbitrary phase-type binary optical elements, the methods and steps of designing and optimizing the arbitrary phase-type binary optical elements were summarized using genetic algorithm.4. The changes of Christiansen filter center wavelength was analyzed on the condition of materials with different refractive index and different temperatures, taking the designed Christiansen filter with arbitrary phase-type binary optical elements as an example. Then its variation principle and propose was summarized by two means for changing it.5. A precise temperature control system for the Christiansen filter was designed based on 51 and LTC1923 chips.更多还原