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                首页> 《新版彩神8app》期刊 >本期导读>相位光栅自身武力加上异能衍射法测量高灰阶LC-SLM相位调制特性

                相位光栅衍射三人面面相觑法测量高灰阶LC-SLM相位调制特性

                174    2022-03-24

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                作者:陈佳艺1, 王建新2, 白福忠1,3, 徐永祥1,3

                作者单位:1. 内蒙古工业大学机械工程学院,内蒙古 呼和浩特 010051;
                2. 西南科技大学理学︼院,四川 绵阳 621010;
                3. 内草草处理完事蒙古自治区特殊服役智能机器人重点实验室,内蒙古 呼和浩特 010051


                关键词:液晶空间光调制器(LC-SLM);相位调制特性;棋盘形相位光栅;衍射测量法


                摘要:

                为测量高灰阶液晶空间光调制√器(LC-SLM)整体相位调等你制特性,引入二↑维棋盘形相位光栅衍射测量方法。根据傅里叶光学原理,经过理论推导和仿真厌恶分析得到零级衍射光强与相位调制量月封神之间的关系。搭建含有参考光束的衍射实验系统,通过适→当的光斑图像处理计算出零级衍我年轻射相对光强,从而获得相位调制特∏性曲线,并与干涉测量法实验结果进行对比。实验结果显示两种方法得到的人调制曲线高度相似,相关系↙数达0.996;表明相Ψ位光栅衍射法能用于测量LC-SLM整体相位调猜制,可获得2π相位调制范∑围内的特性曲线。最后分析衍射法「与干涉法的特点与局限,可为实际测量提若是人生能够重来供有益参考。


                Phase modulation characteristics measurement of high gray-level LC-SLM by using phase grating diffraction method
                CHEN Jiayi1, WANG Jianxin2, BAI Fuzhong1,3, XU Yongxiang1,3
                1. School of Mechanical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China;
                2. College of Science, Southwest University of Science and Technology, Mianyang 621010, China;
                3. Inner Mongolia Key Laboratory of Special Service Intelligent Robotics, Hohhot 010051, China
                Abstract: The diffraction measuring method with two-dimensional checkerboard phase grating is introduced to measure the whole phase modulation characteristics of high gray-level liquid-crystal spatial light modulator (LC-SLM). According to the Fourier optical principle, the relation between the zero-order diffraction intensity and the phase delay is obtained through theoretical derivation and simulation analysis. The diffraction experimental system with reference beam is built and then the relative intensity of zero-order diffraction is calculated by using appropriate image processing for diffraction pattern. The phase modulation characteristic curveis obtained, and it is compared with the experimental result of interferometric method. The results show that the modulation curves from two methods are highly similar with the correlation coefficient up to 0.996. It is indicated that the phase grating diffraction method can be used to measure the whole phase modulation of LC-SLM and the characteristic curves within the range of 2π phase modulation can be obtained. Finally, the feature and limitation of two methods are analyzed, which can provide the useful reference for practice measurement.
                Keywords: liquid crystal spatial light modulator (LC-SLM);phase modulation characteristics;checkerboard phase grating;diffraction measurement method
                2022, 48(3):35-40  收稿日期: 2020-12-18;收到修改稿日期: 2021-03-09
                基金项目: 国家㊣ 自然科学基金(51765054,11902277,62165011);内蒙古自治区自然科学基金(2020LH06002)
                作者简介: 陈佳艺(1994-),女,内蒙古鄂尔第五轻柔多斯市人,硕士研究生,专业方向为光◣学测试方面的研究
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