宏观傅里叶叠层技术远距离成像实验研究  

Experimental Research on Long-Range Imaging Using Macroscopic Fourier Ptychographic Technology

作　　者：田芷铭 赵明[1] 王森 李剑 TIAN Zhiming;ZHAO Ming;WANG Sen;LI Jian(Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学,大连116026

出　　处：《航天返回与遥感》2023年第6期38-44,共7页Spacecraft Recovery & Remote Sensing

摘　　要：傅里叶叠层是一新型的宽视场高分辨成像技术,但是其在宏观成像领域的应用中,成像模型在米级成像距离下通常仅有2 cm左右的成像视场,难以满足使用要求。为了提高宏观傅里叶叠层技术的成像距离和视场,文章开展了远距离宏观反射式傅里叶叠层成像模型的理论研究,提出了一种新的宏观傅里叶叠层成像模型,该模型使用发散光束照明,通过球面波移位对目标傅里叶谱进行扫描重建高分辨率目标图像;此外,还分析了宏观相干成像机理和傅里叶成像模型近似条件,由此推导出模型的近似范围,为模型推广提供了理论基础;最后,利用搭建的实验系统对10m外目标成像,使目标分辨率从1.4 mm提升到0.35 mm,分辨率提升4倍以上,验证了模型具有通过合成孔径技术提升目标成像分辨率的能力。Fourier ptychography is a promising high-resolution imaging technique that has been gradually applied in the field of macroscopic imaging.However,its imaging model typically provides a limited field-of-view of around 2 cm at meter-level imaging distances,which often falls short of practical requirements.To enhance the imaging distance and field-of-view of macroscopic Fourier ptychography,this article conducted theoretical research on the long-distance macro reflection Fourier stack imaging model.The proposed model utilizes diverging light beams for illumination,scans the target Fourier spectrum using spherical wavefront shifting,and reconstructs high-resolution target images.The article analyzes the mechanism of macroscopic coherent imaging and the approximation conditions of the Fourier imaging model,deriving the approximate range of the model and establishing a theoretical foundation for its extension.Finally,the built experimental system was used to image a target 10 meters away,increasing the target resolution from 1.4 mm to 0.35 mm,a resolution increase of more than 4 times,verifying the model’s capability to improve target imaging resolution through the synthetic aperture technology.

关 键 词：宏观成像 傅里叶叠层成像模型 远距离成像 超分辨技术 傅里叶叠层实验 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]