基于空间调制器的透镜设计与成像研究  

Research on lens design and imaging based on spatial light modulation

作　　者：李恩琪 李武军[1] 王晓颖[2] 蔡佳林 LI Enqi;LI Wujun;WANG Xiaoying;CAI Jialin(School of sciences,Xi’an Technological University,Xi’an 710021,China;College of New Students,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学基础学院,西安710021 [2]西安工业大学新生院,西安710021

出　　处：《激光杂志》2022年第1期64-69,共6页Laser Journal

摘　　要：为了研究利用空间光调制器制作的菲涅尔透镜的特性,基于标量衍射理论推导了透镜的相位分布函数,建立了菲涅尔透镜的模型;并通过实验测量了空间光调制器的相位—灰度特性曲线,得到了相位与灰度的函数关系。制作了焦距为100 mm和150 mm的菲涅尔透镜相位灰度图。通过实验研究了该菲涅尔透镜成放大实像和缩小实像的成像规律;结果表明,针对两个物体所成最清晰的像位置均在理论成像位置附近,且处于成像清晰度评价值大于0.8的成像位置范围之内。表明利用空间光调制器制作菲涅尔透镜满足透镜的成像规律,能很好地实现透镜的成像功能。In order to study the properties of Fresnel lens made by space light modulator, the phase distribution function of the lens is derived based on scalar diffraction theory, and the Fresnel lens model is established, The phase-gray characteristic curve of space light modulator is measured experimentally, and the function relation between phase and gray is obtained. Phase grayscale images of Fresnel lens with focal lengths of 100 mm and 150 mm are made. The imaging law of the Fresnel lens is studied experimentally. The results show that the clearest image positions of the two objects are near the theoretical imaging positions, and within the range of the imaging position with the evaluation value of imaging sharpness greater than 0.8. The results show that Fresnel lens made by space light modulator can satisfy the imaging law of lens and realize the imaging function of lens well.

关 键 词：空间光调制器 相位灰度图 菲涅尔透镜 透镜成像 

分 类 号：O438.2[机械工程—光学工程]