基于填充因子的微透镜阵列扫描光学系统性能分析  

Performance Analysis of Scanning Optical System with Microlens Array Based on Fill Factor

作　　者：葛增辉 黄蕴涵 刘智颖[1] Ge Zenghui;Huang Yunhan;Liu Zhiying(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《光学学报》2023年第9期107-116,共10页Acta Optica Sinica

基　　金：国家自然科学基金(617050183);吉林省科技发展计划(202002037jc)。

摘　　要：针对通过微透镜阵列通光孔径的光束在不同条件下的填充问题,利用填充因子来表征微透镜阵列系统光瞳位置处光束的填充率,并分析其对系统探测距离、点扩散函数和光学传递函数的影响。基于近轴光学模型,构建了快速计算微透镜阵列扫描光学系统填充因子的数学模型,并提出一种系统设计方法。利用该方法设计了微透镜阵列扫描光学系统,所设计系统的实验结果与理论计算结果吻合,表明该系统的性能良好。Objective Beam scanning has been widely used in laser radar and optical communications.Conventional beam scanning methods with mechanical structures suffer from many limitations,such as large volumes,low switching speeds,and high powers.Optical phased array is a new technique that enables beam scanning,and phase modulator components used in optical phased array scanning technology mainly include liquid crystal,optical waveguide,electro-optical crystal,microlens array,and micromirror array.Electro-optical scanning device has some problems,such as low response speed,high driving voltage,and difficult large-aperture beam scanning.The scanning technology with a microlens array has the advantages of simple structure,miniaturization,lightweight,high scanning speed,and large aperture.Scanning imaging optical system with a microlens array includes microlens array elements,and the rays do not fill the clear aperture of the microlens array owing to the effect of scanning angle and microlens array structure.One property of the microlens array system is that the wavefront exiting the microlens array is no longer continuous,and the motion of the microlens array results in non-rotational symmetry of the system,which brings new challenges to the traditional design methods and performance evaluation of optical systems.In this paper,a preliminary theoretical study is conducted on the performance and imaging models of imaging optical systems based on optical phased array scanning technology with a microlens array,which can benefit the design and evaluation of microlens array systems.Methods The scanning imaging optical system with a microlens array is a combined optical system,and the scanning function is accomplished by the motion of the microlens array.Firstly,the performance of the system is affected by the discontinuity and periodicity of the beam passing through the pupil,and the fill factor is adopted in this study to characterize the fill rate of rays at the pupil position of the microlens array system.The effect of the fil

关 键 词：成像系统 光束扫描 微透镜阵列 填充因子 探测距离 点扩散函数 光学传递函数 

分 类 号：O435.1[机械工程—光学工程]