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| Design and Research of an Integrated Imaging Method of Snapshot
Computed Spectral Polarization on UAV |
| LIU Yi, ZHANG Xue-min, YU Yue, ZHAO Hai-bo, LIU Yan-li, REN Wei-he, ZHENG Guo-xian |
Beijing Institute of Space Mechanics and Electricity, Beijing 100094, China
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Abstract Target detection and recognition technology play an important role in the field of remote sensing. Spectral polarization imaging technology not only obtains the two-dimensional image information of the target, but also obtains the spectral information and polarization information of the target, which can distinguish “different objects with the same spectrum,” highlight the target, “identify the authenticity”, and improve the detection and recognition probability of the target in the complex background environment. The current polarization spectroscopy imaging system has many drawbacks, such as a complex structure, a large volume and weight, and an inability to image in real time. To solve these problems, an integrated imaging method based on snapshot calculation of spectral polarization is proposed. The main optical path is shared between the polarization channel and the spectral channel, and the beam splitter prism is used to divide the polarization channel and the spectral channel. The polarization channel is directly imaging, and the spectral channel is composed of the coding plate, Amici prism, and collimation system. By utilizing the telecentric optical path to enhance the imaging quality of the system, the optical system and spectral elements were designed and optimized to achieve real-time synchronous acquisition of spectral and polarization information. Based on the above technical route, the principal prototype is integrated, and the prototype is tested in the laboratory darkroom. The final indicators are: working band: 400~900 nm, imaging resolution: 0.1 m, field of view: 29.09°, spectral resolution: 10 nm, prototype weight: 2.75 kg. The real-time imaging test was carried out outdoors, and the polarization state images and spectral curves of different ground objects were obtained. The imaging effect was good, meeting the expected target. This method compensates for the shortcomings of traditional methods and provides a new and effective technical means for obtaining multidimensional information in snapshot polarization spectra.
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Received: 2025-02-19
Accepted: 2025-08-29
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