基于大剪切方棱镜的三维电子散斑干涉技术  

Three-dimensional ESPI based on large shearing blocky prism

作　　者：王兴海[1] 孙平[1] 高秀梅[2] 赵瑞冬[1] 范香菊[1] 

机构地区：[1]山东师范大学物理与电子科学学院,山东济南250014 [2]济南铁道职业技术学院,山东济南250013

出　　处：《光电子．激光》2011年第2期277-280,共4页Journal of Optoelectronics·Laser

基　　金：山东省科技攻关资助项目(2007GG20004002)

摘　　要：提出了一个新的测量物体三维形变量的系统。其中,光源部分由3个激光器组成,参考物被粘贴在压电陶瓷(PZT)相移器上,通过该相移器产生参考光并实现相移,物光和参考光通过放置在CCD前方的大剪切棱镜产生干涉。为了验证该系统的可行性,对简支梁进行了位移场的测量,并给出了实验结果。由于大剪切方棱镜采用普通玻璃材料制成,因此不仅克服了采用双折射材料带来实验成本的增加,还进一步提高了干涉条纹的质量。A new three-dimensional（3-D） electronic speckle pattern interferometry（ESPI） system is constructed by using three ESPI systems,a large shearing blocky prism and a reference.In the system,the light source was composed of three lasers,and the reference was attached to the PZT phase shifter.At the same time,the PZT phase shifter could be used to generate a reference light and push reference plane to change optical path of reference light.Then the object light interfered with the reference light through a large shearing blocky prism that was placed in front of the CCD camera.In order to prove the feasibility of the technique,the displacement field of a crossbeam is measured,and the results are offered.In this experiment,a large shearing blocky prism whose shearing principle is completely different from that of Wollaston prism,was first used to achieve large shearing.Since the blocky prism is made of ordinary glass materials,it overcomes the increased costs,and the quality of fringes is further improved.Thus,the technique provides a new way for the measurement of（3-D） displacement field.

关 键 词：物理光学 电子散斑干涉(ESPI) 大剪切 相移 三维位移测量 

分 类 号：O348[理学—固体力学]