新型无衍射栅型结构光投影系统  

Novel non-diffract grating structure for light projection system

作　　者：干江红[1] 周莉萍[1] 陈良洲[1] 徐龙[1] 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2011年第5期14-17,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50975112);湖北省自然科学基金资助项目(2009CDB197)

摘　　要：提出了一种用于相位法测量的无衍射栅型结构光条纹投影系统,以截面三角棱镜为主要光学元件来获取无衍射栅型结构光投影条纹.从理论上分析了栅型无衍射结构光的无衍射特性以及三角棱镜相关参数对条纹图样的影响,实验测量了系统观察屏上的条纹间距.理论分析与实验表明:该系统产生的无衍射结构光条纹的光强成正弦分布且对比度好,用于相位测量可以获得较高的相位分辨率,提高相位法测量的精度.整个系统光路简单、结构紧凑,有利于系统的集成与小型化.A non-diffract grating structure for the light projecting systems used in phase measurement technology was described. The projecting fringe was produced by triangle-section prism as the main optical element. The non-diffract character of the fringe patterns and impact of the parameters of tri- angle-section prism on the fringe pattern were analyzed. Fringespacing observation plan was measured by experiment. Results show that the fringe has properties of sinusoidal density distribution, good contrast and equal spacing with which high phase resolution in phase measurement can be obtained. The whole projecting system is simple and compact, which helps to realize the integration and miniaturization of the system.

关 键 词：光学干涉 无衍射 截面三角棱镜 投影条纹 相位法测量 

分 类 号：O436.1[机械工程—光学工程]