剪切散斑干涉术的无损检测研究  

ON SPECKLE SHEARING INTERFEROMETRY IN NON -DESTRUCTIVE DETECTION

作　　者：陆福一[1] 张朝晖[1] 李恩普[1] 陈长乐[1] 

机构地区：[1]西北工业大学应用物理系,西安,710072

出　　处：《光子学报》1993年第1期70-76,共7页Acta Photonica Sinica

摘　　要：剪切散斑干涉术用于复合材料的光学无损检测具有较宽的加载范围,便于实现缺陷的全场记录,防止漏检。本文从理论上推导了剪切散斑干涉条纹(等应变条纹)的强度分布,并证明随着加载量的增大,条纹变密的程度较全息干涉条纹(等位移条纹)缓慢。加之,剪切散斑干涉条纹灵敏度具有可调性,加载范围大为加宽。实验观察与理论分析一致。The speckle shearing interferometry applied in optical non-destructive detection on composite materials is accompanied with a significant wide range of loading that will be of benefit to such whole-field observations and, that avoided the omission of detection.Intensity distribution of shearing interferometric fringe (equi-strain fringe) is presented in a move general way, wich shows that its density increases more slowly than that of holographic interferometric fringe (eqiu-displacement fringe) as the loading increases. An adjustable sensitivity characterized by the shearing fringe itself will additionally broaden the loading range greatly. Experimental observations agree upon the analyses.

关 键 词：无损检验 全息干涉法 散斑法 剪切 

分 类 号：O348.12[理学—固体力学]