基于4f的大视角剪切散斑干涉系统设计

发布时间：2018-02-02 18:34

本文关键词： 无损检测数字剪切散斑干涉 f光学系统大视角迈克尔逊干涉仪　出处：《应用光学》2015年02期 　论文类型：期刊论文

【摘要】：数字剪切散斑干涉技术在工业无损检测领域有广阔的应用前景,传统的迈克尔逊型数字剪切散斑干涉仪由于结构的限制,视场角很小,这限制了其在工程上的应用。介绍一种新型的大视角剪切散斑干涉系统,通过在成像镜头和CCD传感器之间嵌入4f光学系统来扩大其视场角,并实现镜头的外置。理论分析证明,视场角不再受到迈克尔逊结构的限制,仅仅取决于镜头的焦距和CCD传感器的靶面尺寸。设计并组建了一个大视场角迈克尔逊剪切散斑干涉系统,对比实验表明,在短的工作距离下实现了大视场的全场检测,在1m的测距下,新系统测量面积可达800mm×600mm,而传统的系统测量面积只有250mm×200mm。
[Abstract]:Digital shearing speckle interferometry has a broad application prospect in the field of industrial nondestructive testing. The traditional Michelson digital shearing speckle interferometer has a very small field of view due to the limitation of its structure. This limits its application in engineering. A new type of large angle shearing speckle interferometry system is introduced, which expands the field of view angle by embedding a 4f optical system between the imaging lens and the CCD sensor. The theoretical analysis shows that the angle of view is no longer restricted by Michelson structure. Based on the focal length of lens and the target size of CCD sensor, a Michelson shearing speckle interferometry system with large field of view is designed and constructed. Under the condition of short working distance, the full-field detection of large field of view is realized. Under the distance of 1m, the measuring area of the new system can reach 800mm 脳 600mm. The traditional measurement area is only 250 mm 脳 200 mm.
【作者单位】：合肥工业大学;北京信息科技大学仪器科学与光电工程学院;
【基金】：国家自然科学基金项目(51375136) 安徽省国际科技合作计划(12030603012) 中航工业产学研专项基金(CXY2013HFGD22)
【分类号】：TH744.3
【正文快照】： 引言数字剪切散斑干涉术具有全场、非接触、实时、高精度、高灵敏度、防震要求低等优点[1-3],近年来,数字式错位散斑干涉仪在无损检测领域有广泛的应用,包括应变测量、材料特性表征、残余应力评估、泄漏探测和振动分析等[4-6]。近年来,国内外研究人员围绕数字剪切散斑干涉术做

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