层叠微透镜阵列扫描成像系统的动态像差  被引量:1

Dynamic Aberrations of Scanning Imaging System with Cascaded Microlens Arrays

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作  者:潘志达 苏晓琴 周岩 穆郁[2] 吉佳瑞 杨磊[1] 谢洪波[1] Pan Zhida;Su Xiaoqin;Zhou Yan;Mu Yu;Ji Jiarui;Yang Lei;Xie Hongbo(Key Laboratory of the Ministry of Education on Optoelectronic Information Technology,School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Tianjin Jinhang Institute of Technical Physics,Tianjin 300308,China)

机构地区:[1]天津大学精密仪器与光电子工程学院,光电信息技术教育部重点实验室,天津300072 [2]天津津航技术物理研究所,天津300308

出  处:《光学学报》2023年第19期145-153,共9页Acta Optica Sinica

基  金:基础加强计划重点基础研究项目(2020JCJQZD06600)。

摘  要:以层叠微透镜阵列扫描成像系统的动态像差为研究目标,基于非旋转对称光学系统的矢量波像差理论,建立了层叠微透镜阵列扫描成像系统的动态波像差理论模型,提出一种可用于系统波像差计算的适用性方法。同时,将动态波像差模型应用于两片式微透镜阵列扫描结构的像差分析中,分析了多扫描视场下的初级波像差以及均方根(RMS)波前差,并计算了不同扫描视场下的初级波像差值在光学表面上的分布。所得研究结果对层叠微透镜阵列扫描成像系统的设计优化与装调实验具有理论指导和工程化意义。Objective The limitations of infrared optical systems are mainly attributed to the performance of current practical detectors,which results in a typically narrow imaging field of view.However,employing a scanning imaging system with cascaded micro-lens arrays can extend the imaging field of view.Diffraction effects,beam crosstalk,and dynamic aberration generated during scanning are the principal factors affecting the image quality of the scanning imaging system with cascaded micro-lens arrays.Dynamic aberration is the aberration value of the system with various scanning stages.Our purpose is to study the dynamic aberration characteristics of the system.Building an appropriate theoretical model to describe dynamic aberrations is essential for the system design.Aberration can be applied to guide the system alignment due to the increasingly strict requirements for the alignment of cascaded micro-lens arrays.The distribution control of aberrations on individual optical surfaces is efficient in reducing the system tolerance.The tolerance range can be presented by calculating the aberrations with various scanning stages.Therefore,our study has theoretical and engineering significance in guiding the design optimization and alignment test of scanning imaging systems with cascaded micro-lens arrays.Methods As the cascaded micro-lens arrays are displaced relative to each other during the scanning,the sub-unit of the scanning system becomes non-rotationally symmetric.The nodal wavefront aberration theory is adopted to describe the aberrations of such systems.Based on this theory,we build a dynamic wavefront aberration model for scanning imaging systems with cascaded micro-lens arrays and propose a method for calculating the wavefront aberrations of the systems.We then apply this model and calculation method to analyze a two-piece micro-lens arrays scanning model.We first examine the primary aberrations under multiple scanning fields of view and discuss how these primary aberrations vary with the scanning fields of view.Then

关 键 词:成像系统 红外成像 微透镜阵列 扫描系统 动态波像差 矢量像差理论 

分 类 号:O436[机械工程—光学工程]

 

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