单像素复振幅成像及实验分析  

Single pixel complex amplitude imaging and experimental analysis

作　　者：张跃华 隋国荣[1] ZHANG Yuehua;SUI Guorong(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2020年第5期57-62,共6页Optical Instruments

摘　　要：光场的光强信息和相位信息成像在医学、光学测量、三维成像等领域至关重要。设计了一种无需参考光束即可实现光场复振幅成像的单像素成像系统。该成像系统通过相位型光学掩模对光场信息进行调制,利用无分辨率的光电探测器探测调制后的光强信息,应用phaselift算法恢复光场的光强与相位信息。利用单像素成像系统对衍射光场及透明聚二甲基硅氧烷(PDMS)薄膜物体进行了成像实验,从成像结果中可以清晰看到衍射环的光强信息与相位信息。实验中物体薄膜的相位差为0.053,刻线宽度为220μm,实验得到图像相位差为0.046和刻线宽度为256μm,与传统检测手段得到的图像信息非常接近。该系统的成像光路无需参考光束,系统简单便于集成,促进了便携式成像系统的发展,可应用于宽光谱成像,在光场复振幅成像方面具有较大发展潜力。The imaging of light intensity information and phase information of the light field is very important for medical,optical measurement,three-dimensional imaging etc.We have designed a single-pixel imaging system that can achieve complex amplitude imaging of the light field without a reference beam.The imaging system modulates the light field information through a phase-type optical mask,uses a non-resolution photodetector to detect the modulated light intensity information,and uses the Phaselift algorithm to recover the light intensity and phase information of the light field.We utilized the single-pixel imaging system to perform imaging experiments on diffracted light fields and transparent PDMS thin film objects.From the imaging results,light intensity information and phase difference information of the diffraction ring can be clearly observed.The phase difference is 0.053 and the width of the groove is 220μm of the object film in the experiment,and the phase difference is 0.046 and the width of the groove is 256μm of the image obtained by the experiment,which indicates that the imaging system is very close to the image information obtained by the traditional detection method.The imaging optical path of the system does not require a reference beam,and the system is simple and easy to integrate,which has promoted the development of portable imaging systems.It can be applied to wide-spectrum imaging and has great development potential in light field complex amplitude imaging.

关 键 词：单像素 光强成像 相位成像 空间光调制器 

分 类 号：TN253[电子电信—物理电子学]