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基于双通道剪切干涉的高光谱偏振成像方法

Interferometric Imaging Spectropolarimeter Using Dual-Channel Lateral Shearing Beam Splitter

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摘要

光谱偏振成像技术可同步测量目标的空间信息、光谱成分和偏振特性分量, 在天文物理研究、大气成分的探测和生物医学等领域具有巨大的发展潜力。偏振信息的同步获取通常牺牲光谱成像的空间分辨率, 为避免光谱成像空间分辨率的降低, 提出基于双通道剪切干涉的高光谱偏振成像方法。利用双矩形干涉器实现双通道剪切干涉, 两个通道分别进行高分辨率干涉光谱成像以及基于微偏振阵列的光谱偏振成像。分析了双通道剪切干涉以及基于微偏振阵列调制的傅里叶变换光谱偏振成像原理, 论述了光谱信息反演方法以及偏振信息提取方法。搭建了实验装置, 对实际场景目标进行光谱偏振成像实验, 获得了目标的高空间分辨率光谱图像和偏振分量信息。研究表明, 该高光谱偏振成像技术可同步进行偏振成像测量和高分辨率光谱成像测量。

Abstract

Imaging spectropolarimeter can concurrently obtain the spatial information, spectral characteristics and polarization information of the target, it is a well-recognized technique and widely used in scientific applications, such as astrophysics, detection of atmospheric composition, biomedicine and other areas. The polarization information is generally acquired with the tradeoff of the decrease of the spectral imaging spatial resolution in imaging spectropolarimeters. An interferometric imaging spectropolarimeter using dual-channel lateral shearing beam splitter is proposed to avoid the decrease of spatial resolution. A dual-rectangle lateral shearing beam splitter is used in imaging spectropolarimeter, which makes it a dual-channel imaging spectropolarimeter. The two channels are used for high spatial resolution interferometric imaging and polarization spectral imaging based on micro-polarization array, respectively. The principle of the dual-rectangle lateral shearing beam splitter and the Fourier transform polarization spectral imaging based on micro-polarization array modularization are analyzed. The spectrum recovery method and extraction mode of polarization information are discussed. High spatial resolution spectral images and polarization images of a scene in the visible region are acquired by the experimental apparatus, which proves that the proposed imaging spectropolarimeter can concurrently be used for polarization imaging measurement and high spatial resolution spectral imaging measurement.

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中图分类号:O433

DOI:10.3788/aos201737.1011002

所属栏目:成像系统

基金项目:国家自然科学基金(61475072)、国家重大科学仪器设备开发专项(2013YQ150829)、中央高校基本科研业务费专项资金(30916014112-010)

收稿日期:2017-04-26

修改稿日期:2017-05-30

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刘成淼:南京理工大学电子工程与光电技术学院, 江苏 南京 210094南京理工大学先进固体激光工业和信息化部重点实验室, 江苏 南京 210094
李建欣:南京理工大学电子工程与光电技术学院, 江苏 南京 210094南京理工大学先进固体激光工业和信息化部重点实验室, 江苏 南京 210094
朱日宏:南京理工大学电子工程与光电技术学院, 江苏 南京 210094南京理工大学先进固体激光工业和信息化部重点实验室, 江苏 南京 210094
崔向群:南京理工大学电子工程与光电技术学院, 江苏 南京 210094中国科学院国家天文台南京天文光学技术研究所, 江苏 南京 210042

联系人作者:刘成淼(liuchengmiao10@aliyun.com)

备注:刘成淼(1989-), 男, 博士研究生, 主要从事成像光谱偏振技术方面的研究。

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引用该论文

Liu Chengmiao,Li Jianxin,Zhu Rihong,Cui Xiangqun. Interferometric Imaging Spectropolarimeter Using Dual-Channel Lateral Shearing Beam Splitter[J]. Acta Optica Sinica, 2017, 37(10): 1011002

刘成淼,李建欣,朱日宏,崔向群. 基于双通道剪切干涉的高光谱偏振成像方法[J]. 光学学报, 2017, 37(10): 1011002

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