特殊点的两步广义相移干涉相移值提取算法  

Phase Shift Extraction Algorithm by Special Points in Two-Step Generalized Phase-Shifting Interferometry

作　　者：周志盛[1,2,3] 董玉明[1,2,3] 章逸舟 焦国华[1,2,3] 鲁远甫[1,2,3] 吕建成[1,2,3] 

机构地区：[1]中国科学院深圳先进技术研究院,广东深圳518055 [2]香港中文大学,香港沙田999077 [3]深圳生物医学光电传感技术工程实验室,广东深圳518055

出　　处：《中国激光》2016年第5期210-217,共8页Chinese Journal of Lasers

基　　金：深圳市技术开发项目(CXZZ20140903152826677)

摘　　要：提出了一种基于特殊点的两步广义相移干涉相移值提取算法。搜索干涉图中满足特殊要求的点位置并利用相移值和特殊点数据关系计算得到相移值。根据是否需要记录物光和参考光图像分为盲提取和非盲提取两种方式。进行了理论分析、模拟仿真及实验验证。实验结果表明,该算法在速度和精度上达到同类算法的水平,在干涉条纹数少于1时相移提取值精度优于同类算法。A phase shift extraction algorithm based on the special points in two-step generalized phase-shifting interferometry is proposed. This algorithm searches the special points that meet specific requirements and calculates the phase shift via the latter＇s relationship with these special points. It is divided into two modes according to whether the intensity distributions of the two interference beams are recorded or not. Theoretical analysis, computer simulation and experimental verification are carried out. Experimental results show that this algorithm reaches the same level of other algorithms in speed and accuracy. Moreover, when the interferogram＇s fringe number is less than one, a better phase shift extraction accuracy can be obtained.

关 键 词：相干光学 相移值提取 特殊点 盲提取 非盲提取 

分 类 号：TB96[机械工程—光学工程]