| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Real-time and high-transmission middle-infrared optical imaging system based on a pixel-wise metasurface micro-polarization array |
| Lifeng Ma(马丽凤)1,†, Shan Du(杜杉)1,†, Jun Chang(常军)1,‡, Weilin Chen(陈蔚霖)1, Chuhan Wu(武楚晗)2, Xinxin Shi(石鑫鑫)1, Yi Huang(黄翼)1, Yue Zhong(钟乐)1, and Quanquan Mu(穆全全)3 |
1. School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China;
2. Information Science Academy, China Electronics Technology Group Corporation, Beijing 100098, China;
3. State Key Laboratory of Applied Optics, China Changchun Institute of Optics, Fine Mechanics and Physics, Changchun 130033, China |
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Abstract Real-time polarization medium-wave infrared (MIR) optical imaging systems enable the acquisition of infrared and polarization information for a target. At present, real-time polarization MIR devices face the following problems: poor real-time performance, low transmission and high requirements for fabrication and integration. Herein, we aim to improve the performance of real-time polarization imaging systems in the MIR waveband and solve the above-mentioned defects. Therefore, we propose a MIR polarization imaging system to achieve real-time polarization-modulated imaging with high transmission as well as improved performance based on a pixel-wise metasurface micro-polarization array (PMMPA). The PMMPA element comprises several linear polarization (LP) filters with different polarization angles. The optimization results demonstrate that the transmittance of the center field of view for the LP filters is up to 77% at a wavelength of 4.0 μ and an extinction ratio of 88 dB. In addition, a near-diffraction-limited real-time MIR imaging optical system is designed with a field of view of 5° and an F-number of 2. The simulation results show that an MIR polarization imaging system with excellent real-time performance and high transmission is achieved by using the optimized PMMPA element. Therefore, the method is compatible with the available optical system design technologies and provides a way to realize real-time polarization imaging in MIR wavebands.
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Received: 09 June 2022
Revised: 19 October 2022
Accepted manuscript online: 09 December 2022
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PACS:
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42.15.-i
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(Geometrical optics)
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42.25.Ja
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(Polarization)
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42.15.Eq
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(Optical system design)
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42.79.-e
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(Optical elements, devices, and systems)
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| Fund: Project supported by the National Key R&D Program of China(Grant No.SKLA02020001A05). |
Corresponding Authors:
Jun Chang
E-mail: optics_chang@126.com
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Cite this article:
Lifeng Ma(马丽凤), Shan Du(杜杉), Jun Chang(常军), Weilin Chen(陈蔚霖), Chuhan Wu(武楚晗), Xinxin Shi(石鑫鑫), Yi Huang(黄翼), Yue Zhong(钟乐), and Quanquan Mu(穆全全) Real-time and high-transmission middle-infrared optical imaging system based on a pixel-wise metasurface micro-polarization array 2023 Chin. Phys. B 32 084201
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