中国激光, 2013, 40 (12): 1208003, 网络出版: 2013-11-19   

广义相移干涉术相移提取算法的分类与评估方法

Classification and Comparison of Phase Shift Extraction Algorithms in Generalized Phase-Shifting Interferometry
作者单位
山东大学信息科学与工程学院山东省激光技术与应用重点实验室, 山东 济南 250100
摘要
在对各种广义相移干涉相移提取算法进行总结分类的基础上,提出一种利用实验可探测量对广义相移干涉相移提取算法进行比较评估的方法。基于离轴数字全息、以重建光波场中直流项和共轭像的残留量作为判据,通过定义重建光波场的信噪比,实现对不同广义相移干涉相移值提取算法的比较评估。理论分析和计算机模拟实验证明:重建光波场的信噪比越大,重建光波场中直流项和共轭像的残留量越小、提取的相移值越准确。选取六种典型的广义相移干涉算法在计算机模拟和光学实验中进行了评估和比较,其结果是一致的,证明了该方法的可行性和有效性。
Abstract
Based on the summarization and classification on different kinds of phase shift extraction algorithms in generalized phase-shifting interferometry (GPSI), an evaluation and comparing method for these GPSI algorithms is proposed according to experimental detectable amount. Based on off-axis digital holography, by using the residual of direct current (DC) term and conjugate image in reconstructed wave field as criterion, GPSI algorithms can then be evaluated and compared by defining the signal-to-noise ratio (SNR) in reconstructed wave field. Theoretical analysis and computer simulation experiment have proven that the bigger the SNR is, the little the residual of DC term and conjuage image is and the more accurate the extracted phase shift is. Six typical algorithms are compared in simulation and optical experiment and the results are consistent, which verify the feasibility and validity of this method.
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李杰, 王玉荣, 孟祥锋, 杨修伦, 刘迪, 徐仰惠, 刘敬伟. 广义相移干涉术相移提取算法的分类与评估方法[J]. 中国激光, 2013, 40(12): 1208003. Li Jie, Wang Yurong, Meng Xiangfeng, Yang Xiulun, Liu Di, Xu Yanghui, Liu Jingwei. Classification and Comparison of Phase Shift Extraction Algorithms in Generalized Phase-Shifting Interferometry[J]. Chinese Journal of Lasers, 2013, 40(12): 1208003.

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