中国光学2022，Vol.15Issue(4)：812-824,13.DOI:10.37188/CO.EN.2022-0001
雷体罩模态振型与激光散斑干涉信号的关系解析
Analysis of the relationship between the mode shapes of a landmine's upper casing and its laser speckle interference signal
摘要
Abstract
The mapping relationship between the mode shapes of a plastic landmine's upper casing and its laser speckle interference signal was studied.The mode shape function of a landmine's upper casing is estab-lished according to the vibration equation of its thin circular plate.Then,based on the principle of laser shear-ing speckle interference and the time-average method of a CCD camera,we mapped the out-of-plane dis-placement of the mode shape to the phase of the interference laser.The study shows that the different mode shapes of the landmine correspond to the unique Bessel fringes.Furthermore,the Bessel fringes of two modes are simulated,and the corresponding experiments were carried out.Both the numerical and experi-mental results confirm the theoretical conclusions,the research in this paper can provide theoretical evidence for realizing the rapid scanning technology of acoustic-optics landmine detection.关键词
声震探雷/散斑干涉/贝塞尔条纹/时间平均Key words
acoustic-to-seismic landmine detection/speckle interference/Bessel fringe/time-average分类
信息技术与安全科学引用本文复制引用
张小青,王驰,李金辉,罗欣宇,于瀛洁..雷体罩模态振型与激光散斑干涉信号的关系解析[J].中国光学,2022,15(4):812-824,13.基金项目
国家自然科学基金(No.62175144,No.61773249) （No.62175144,No.61773249）
近地面探测技术重点实验室资助项目(No.TCGZ 2020C003) （No.TCGZ 2020C003）
上海市科技创新行动计划(No.20142200100)Supported by the National Natural Science Foundation of China(No.62175144,No.61773249) （No.20142200100）
the Science and Technology on Near-Surface Detection Laboratory(No.TCGZ2020C003) （No.TCGZ2020C003）
Shanghai Science and Techno-logy Innovation Action Plan(No.20142200100) （No.20142200100）
