Short-wave infrared (SWIR) polarization imaging using division-of-focal-plane imaging polarimeter.

IF 3.9 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2025-07-02 DOI:10.1038/s41598-025-06757-5

Alaa Hamdoh, Yufei Gao, Oliver Spires, Neal Brock, Linan Jiang, Stanley Pau

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Abstract

This study investigates the polarization properties of materials in the short-wave infrared (SWIR) spectrum using a compact division-of-focal-plane imaging polarimeter. The polarimeter is constructed by packaging a micro-polarizer array on top of an InGaAs sensor. Experiments conducted in both indoor and outdoor environments revealed unique transparency, absorption, and polarization behaviors across various materials. Transparent materials such as plastics, silicon, and black glass exhibited high SWIR transmission, allowing internal visualization, while opaque materials like aluminum, wood, and water demonstrated strong absorption. Polarization analysis identified strong linear polarization in birefringent materials and minimal polarization in isotropic ones, with elliptical or circular polarization arising from mechanisms like total internal reflection, complex refractive index, and birefringence. Outdoor observations showed the interaction of polarized skylights with reflective surfaces, enhancing contrast and revealing surface features. These findings underscore the potential of SWIR polarization imaging for applications in non-destructive testing, remote sensing, biomedical imaging, and optical communication.

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短波红外（SWIR）偏振成像的分焦平面成像偏振计。

本研究利用紧凑型焦平面分割成像偏振计研究了材料在短波红外光谱中的偏振特性。该偏振计由封装在InGaAs传感器顶部的微偏振器阵列构成。在室内和室外环境中进行的实验揭示了不同材料独特的透明度、吸收和极化行为。透明材料如塑料、硅和黑色玻璃表现出高SWIR透射率，允许内部可视化，而不透明材料如铝、木材和水表现出强吸收。偏振分析表明，双折射材料具有较强的线性偏振，各向同性材料具有较弱的偏振，而椭圆或圆偏振是由全内反射、复折射率和双折射等机制引起的。室外观测显示，极化天窗与反射表面相互作用，增强了对比度，揭示了表面特征。这些发现强调了SWIR偏振成像在无损检测、遥感、生物医学成像和光通信方面的应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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