红外与激光工程, 2017, 46 (9): 0924001, 网络出版: 2017-11-17   

数字微镜器件调制多波长关联成像系统

Modulated multi-wavelength correlated imaging system with DMD
作者单位
北京华航无线电测量研究所, 北京 100013
摘要
关联成像是一种新体制成像方法, 能够解决一些传统成像技术无法解决的问题,近年来颇受关注。其中, 又以基于数字微镜器件(DMD)和空间光调制器(SLM)的计算关联成像发展最快。将DMD应用于计算关联成像, 利用其调制速度快、反射波段宽的优势, 结合压缩感知方法, 可在多个波长上获取高质量图像, 实现多波长关联成像。多波长关联成像在实现过程中存在几个关键问题, 包括赝热光场的有效产生、光场调制中衍射效应和调制噪声的影响, 以及高质量图像重建算法等。对上述关键问题进行数值仿真, 确定系统最佳工作参数; 在此基础上构建多波长关联成像实验系统以验证效果, 为关联成像技术的实用化提供了参考。
Abstract
Correlated imaging is a new imaging method, which attracts a lot of attention in recent years. It offers great potential to solve some problems that traditional imaging technologies cannot solve. Among them, computational correlated imaging based on digital micromirror device(DMD) or spatial light modulator(SLM) developed most rapidly. When DMD was applied in correlated imaging system, high-quality images can be obtained at multi-wavelength, and multi-wavelength correlated imaging was redlized, by using the advantages of DMD′s high speed and wide reflective spectrum, with the assistance of compressed sensing. Several problems in the system need to be researched on, including the efficient generation of pseudo thermal light, the influence of diffraction effect and modulation noise on the signal, and the high-quality imaging reconstruction algorithm. After determining the optimal system parameters via numerical simulation, an experimental system was built to verify the effectiveness of the technology, which provide an reference to the practical process of correlated imaging.

马菁汀, 刘尊龙, 王民航, 冯飞, 许江盟, 张卫杰. 数字微镜器件调制多波长关联成像系统[J]. 红外与激光工程, 2017, 46(9): 0924001. Ma Jingting, Liu Zunlong, Wang Minhang, Feng Fei, Xu Jiangmeng, Zhang Weijie. Modulated multi-wavelength correlated imaging system with DMD[J]. Infrared and Laser Engineering, 2017, 46(9): 0924001.

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