Wavelength scanning distance interferometry using inflection point retrieval for phase unwrapping
Wavelength scanning distance interferometry using inflection point retrieval for phase unwrapping
复制标题
使用拐点检索进行相位展开的波长扫描距离干涉测量
DOI：
10.1016/j.optcom.2017.10.030
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发表时间：
2018-03
影响因子：
2.4
通讯作者：
Xia Yunjie
中科院分区：
文献类型：
--
作者：
Ma Rende;Li Xiaoping;Dong Xinyong;Xia Yunjie
提出了一种实时波长扫描距离干涉测量方法。利用总结的两个波形变换规律，将光波长调制产生的干涉信号变换为初步转换信号。利用不连续点判断法（DPJ）和相邻零点距离判断法（ANPDJ）两种互补的方法对干扰信号的拐点进行了提取。基于初步转换信号和检索的拐点，构造正交信号。利用正交解调算法对相移进行解调后，计算出位移。当测量毫米距离时，在大约一小时内测量结果的波动在微米左右。在降低测量复杂度和成本的同时，仍能获得理想的测量结果.该方法可用于多种应用中。
A real-time wavelength scanning distance interferometry is proposed. The interference signal generated by the light wavelength modulation is transformed into preliminary conversion signal with the two summarized waveform transformation laws. Inflection points of the interference signal are retrieved with two complementary methods which are discontinuity point judgment (DPJ) and the adjacent null points distance judgment (ANPDJ). Based on the preliminary conversion signal and the retrieved inflection points, the orthogonal signal is constructed. Displacement is calculated after demodulating the phase shift with the orthogonal demodulation algorithm. When millimeters distance is measured, the fluctuation of the measured result is around micrometers in about one hour. The measurement complexity and cost are all decreased, while, ideal measurement results can still be obtained. The approach can be used in a multitude of applications.
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