Li Jiaosheng, Lu Xiaoxu, Zhang Qinnan, Li Bingbo, Tian Jindong, Zhong Liyun
Opt Express. 2018 Feb 19;26(4):4392-4400. doi: 10.1364/OE.26.004392.
Without the limitations of fringe number and fringe shape, a dual-channel simultaneous spatial and temporal polarization (DC-SSTP) phase-shifting interferometry system is proposed to achieve rapid and accurate phase retrieval through only one-time phase-shifting procedure with unknown phase shifts. First, an arbitrary phase shifts is simultaneously introduced into two channels of DC-SSTP system by a spatial light modulator (SLM). Second, by performing the subtraction operation between each pair of phase-shifting interferograms captured in the same channel, the background deduction of interferogram can be achieved easily, so the accurate phase can be retrieved rapidly. Especially, it is found even if the fringe number in interferogram is less than one, the proposed DC-SSTP method still reveals high accuracy of phase retrieval. Both the simulation and experimental results demonstrate the outstanding performance of proposed DC-SSTP method in phase measurement.
在不受条纹数量和条纹形状限制的情况下，提出了一种双通道同时空间和时间偏振（DC-SSTP）相移干涉测量系统，通过仅一次具有未知相移的相移过程来实现快速准确的相位恢复。首先，通过空间光调制器（SLM）将任意相移同时引入DC-SSTP系统的两个通道。其次，通过对在同一通道中捕获的每对相移干涉图执行减法运算，可以轻松实现干涉图的背景扣除，从而能够快速恢复准确的相位。特别地，发现即使干涉图中的条纹数量小于一个，所提出的DC-SSTP方法仍具有很高的相位恢复精度。仿真和实验结果均证明了所提出的DC-SSTP方法在相位测量中的出色性能。
