莫尔测量法中相位物体位置对结果的影响研究  

Effect of phase object position on results of Moire deflectometry

作　　者：陈雅宜 陈云云[1,2] 张静云 杨翠红[1,2] CHEN Yayi;CHEN Yunyun;ZHANG Jingyun;YANG Cuihong(Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean,Nanjing University of Information Science and Technology,Nanjing 210044,China;Jiangsu International Joint Laboratory on Meterological Photonics and Optoelectronic Detection,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学江苏省大气海洋光电探测重点实验室,江苏南京210044 [2]南京信息工程大学江苏省气象光子学与光电探测国际合作联合实验室,江苏南京210044

出　　处：《应用光学》2022年第5期943-949,共7页Journal of Applied Optics

基　　金：国家自然科学基金(61975083)。

摘　　要：莫尔测量法被广泛用于各类流场的结构显示和关键参量测量中,关于相位物体在光路中的放置位置已有不同的报道,针对该问题进行了理论和实验研究。理论分析表明,当相位物体放置于2个光栅前时,偏移量和相位主要取决于2个光栅之间的距离,偏折角取决于相位物体引起的相位扰动与2个光栅之间的间距的比值;而当相位物体放置于2个光栅之间时,偏移量和相位主要取决于相位物体到后面一个光栅之间的距离,偏折角则取决于相位物体引起的相位扰动与其到后面一个光栅之间的距离的比值。为了验证理论结果的正确性和合理性,实验中选取燃烧蜡烛火焰作为对象,对比发现在两种情况下,只要相应的距离选取适当,则相位物体的位置并不影响实验中重建的相位和偏折角等结果。相关研究成果可为莫尔测量法更好地用于各类流场的检测提供一定的参考。The Moire deflectometry has been widely used in the structural display and key parameter measurement of various flow fields, and there have been different researches for the placement of phase objects in the optical path. The theoretical and experimental studies were carried out on this issue. Theoretical analysis showed that when the measured object was placed in front of two gratings, the offset and phase mainly depended on the distance between two gratings, while the deflection angle was determined by the ratio of phase disturbance and the distance of the two gratings. However, when the measured object was placed between two gratings, the offset and phase mainly depended on the distance from the measured object to the next grating, and the deflection angle was determined by the ratio of phase disturbance and the distance from the measured object to the next grating. In order to verify the correctness and rationality of the theoretical results, a candle flame was taken as an example for experiments. Furthermore, the comparison shows that in two cases, the position of the measured object will not affect the final phase and deflection angle reconstructed in the experiment, as long as the distances mentioned above are suitably chosen. The relevant research results can provide a certain reference for the better use of Moire deflectometry in the detection of various flow fields.

关 键 词：莫尔偏折 相位物体 偏折角 折射率 

分 类 号：TN253[电子电信—物理电子学]