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题名	基于大口径离轴抛物面反射镜光学系统的理论分析与模拟
作者	苏雅茹
学位类别	硕士
答辩日期	2016
授予单位	中国科学院上海光学精密机械研究所
导师	阮昊
关键词	离轴抛物面反射镜 温度特性 脉冲压缩光栅 波像差
其他题名	Theoretical and simulated investigation of optical system based on large diameter off-axis parabolic lenses
中文摘要	大口径衍射光栅在惯性约束核聚变中有重要的应用，特别是高功率啁啾脉冲放大系统中的脉冲压缩光栅。但是通过全息曝光制造大口径、高质量衍射波面的光栅受到了曝光透镜的口径限制。近年来，离轴抛物面反射镜的应用越来越广泛，且制造技术已经越来越成熟。本论文主要对基于大口径离轴抛物面反射镜的光学系统进行了理论分析以及对脉冲压缩光栅波像差进行分析模拟，主要包含以下几个方面： （1）详细介绍了基于大口径离轴抛物面反射镜，通过单次曝光来制备全息光栅的光学系统，同时介绍了条纹锁定系统，并通过计算得出了小参考光栅的空间周期；并且分析了离轴抛物面反射镜以及激光器的参数要求。 （2）对离轴抛物面反射镜、轴对称抛物面反射镜、球面反射镜的成像特性进行了理论分析，并且模拟了以它们作为准直镜时制作的全息光栅的衍射波像差的变化。 （3）由于空间滤波器的三维位置要求非常的苛刻，非常微小的移动会使得全息光栅的衍射波像差产生很大的变化。故利用光学设计软件ZEMAX对该光学系统进行模拟，得到空间滤波器的位置变化对全息光栅衍射波像差的影响。并且当光学系统的波像差的PV值等于1/4波长时，光学系统的分辨率达到衍射极限，可以计算出空间滤波器的调节精度。 （4）对该光学系统的温度特性进行了详细的分析，主要包括通过光学设计软件ZEMAX模拟温度对脉冲压缩光栅的波像差影响，同时分析了温度对光栅的空间周期影响。并且对离轴抛物面反射镜表面镀有的金属膜或者多层介质膜对该系统偏振特性的影响。 （5）对现阶段正在进行的验证系统进行了分析，主要包括反射式曝光系统和透射式曝光系统。分别对这两种系统分析了温度对光栅波像差和光栅刻线空间周期的影响。
英文摘要	Large-size diffraction gratings play important roles in inertial confinement fusion, particularly the pulse compressors in contemporary high-power chirped-pulse amplification laser systems. But to fabricate large-area gratings of high-quality diffraction wavefronts, the traditional method of holographic exposure requires large-aperture collimating lenses. In recent years, the off-axis parabolic lenses is more and more used in large diameter optical systems, and the manufacturing technology has been more and more mature. In this article, the optical system with large diameter off-axis parabolic lenses were adopted to achieve diffraction gratings by laser exposure. We analyzed the influences of optical properties, mainly includes the following several aspects: We introduced the optical system in detail which is based on the large diameter off-axis parabolic lenses to achieve diffraction gratings by laser exposure. We analyzed the fringe locking system and got the spatial period of the small reference grating by calculating. Meanwhile we calculated the parameters of the off-axis parabolic lenses and laser. We analyzed the imaging characteristic of off-axis parabolic mirror, axisymmetric parabolic mirror and spherical mirror in theory, and simulated the variations of the diffraction wavefronts of holographic grating fabricated by the optical system who took them as collimating lenses. Because the requirements of the position of space filter is very high, so we simulated the changes of the diffraction wavefronts aberration (called by PV value) caused by space filter changes by ZEMAX. When the PV value of the optical system is 0.25λ, the optical system would reach the diffraction limit. So the precision of the adjustment of spatial filter can be calculated. We analyzed the temperature characteristics of the optical system which includes simulating the changes of wavefronts aberration of pulse compression gratings caused by the temperature using ZEMAX, and calculating the influence of temperature on the spatial period of the grating. And the metal film or dielectric multilayer film that coating on off-axis parabolic lenses has a important impact on this system. For ongoing validation system - reflective exposure system and transmission exposure system, we carried on the analysis of the temperature characteristic which includes the changes of wavefronts aberration and spatial period of gratings caused by the temperature and wavefronts aberration caused by space filter changes using ZEMAX.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16968]
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	苏雅茹. 基于大口径离轴抛物面反射镜光学系统的理论分析与模拟[D]. 中国科学院上海光学精密机械研究所. 2016.

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