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18 December 2019 Far-field pseudothermal correlation imaging
Hui Yu, Weichao Du, Bo Wang, Chensheng Wang, Zhijie Zhang
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Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 113382H (2019) https://doi.org/10.1117/12.2547628
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China
Abstract
In this paper, a far-field pseudo-thermal correlation imaging system is proposed which is mainly composed of laser, thermal field modulation system, speckle far field emission system and high-sensitivity intensity fluctuation detection system, etc.. Because the correlation imaging system is based on the principle of intensity fluctuation statistical measurement, it needs to be reconstructed after multiple measurements. An image reconstruction algorithm based on compressive sensing is applied in this paper, which makes full use of sparsity constraints to effectively improve the image restoration effect. Finally, the feasibility of the method is verified by actual imaging test. The experimental results show that the proposed system can clearly image the remote target and obtain better recovery images under the same sampling times.
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Hui Yu, Weichao Du, Bo Wang, Chensheng Wang, and Zhijie Zhang "Far-field pseudothermal correlation imaging", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113382H (18 December 2019); https://doi.org/10.1117/12.2547628
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KEYWORDS
Imaging systems
Speckle
Reconstruction algorithms
Image restoration
Sensors
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