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A probability theory for filtered ghost imaging

Chinese Physics B 2023年第4期32卷 329-337页

作者：刘忠源孟少英陈希浩 Key Laboratory of Optoelectronic Devices and Detection Technology College of PhysicsLiaoning UniversityShenyang 110036China

Based on probability density functions,we present a theoretical model to explain filtered ghost imaging(FGI)we first proposed and experimentally demonstrated in 2017[***.425290(2017)].An analytic expression for the joint intensity probability density functions of filtered random speckle fields is derived according to their probability ***,the normalized second-order intensity correlation functions are calculated for the three cases of low-pass,bandpass and high-pass filterings to study the resolution and visibility in the FGI *** simulations show that the resolution and visibility predicted by our model agree well with the experimental results,which also explains why FGI can achieve a super-resolution image and better visibility than traditional ghost imaging.

关键词： ltered ghost imaging probability density function super-resolution

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Resolution-enhanced single-pixel imaging using the Hadamard transform matrix

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Chinese Physics B 2023年第12期32卷 652-656页

作者：别书航王晨晖吕瑞兵鲍倩倩付强孟少英陈希浩 Key Laboratory of Optoelectronic Devices and Detection Technology College of PhysicsLiaoning UniversityShenyang 110036China

We propose a single-pixel imaging(SPI)method to achieve a higher-resolution image via the Hadamard transform *** traditional SPI schemes,this new method recovers images by correlating single-pixel signals with synchronized transformed patterns of Hadamard bases that are actually projected onto the digital micromirror *** transform pattern is obtained through the inverse Fourier transform of the pattern acquired by Gaussian filtering of each Hadamard basis in the frequency *** proposed scheme is based on a typical SPI experimental setup and does not add any hardware complexity,enabling the transformation of Hadamard matrices and image reconstruction through data processing ***,this approach could be considered as an alternative option for achieving fast SPI in a diffraction-limited imaging system,without the need for additional hardware.

关键词： single-pixel imaging Gaussian filtering resolution enhancement

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Iterative filtered ghost imaging

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Chinese Physics B 2022年第2期31卷 681-686页

作者： Shao-Ying Meng Mei-Yi Chen Jie Ji Wei-Wei Shi Qiang Fu Qian-Qian Bao Xi-Hao Chen Ling-An Wu Key Laboratory of Optoelectronic Devices and Detection Technology School of PhysicsLiaoning UniversityShenyang 110036China Institute of Physics Chinese Academy of SciencesBeijing 100190China

It is generally believed that,in ghost imaging,there has to be a compromise between resolution and *** we propose and demonstrate an iterative filtered ghost imaging scheme whereby a super-resolution image of a grayscale object is achieved,while at the same time the signal-to-noise ratio(SNR)and visibility are greatly improved,without adding *** dependence of the SNR,visibility,and resolution on the number of iterations is also investigated and ***,with the use of compressed sensing the sampling number can be reduced to less than 1%of the Nyquist limit,while maintaining image quality with a resolution that can exceed the Rayleigh diffraction bound by more than a factor of 10.

关键词： ghost imaging bandpass filtering compressed sensing iteration

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Thickness-Induced Gradient Micro-Wrinkle Pdms/Mxene/Rgo Wearable Strain Sensor with High Sensitivity and Stretchability for Human Motion detection

SSRN

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SSRN 2024年

作者： Guo, Haoxia Chu, Zhenming Fu, Luming Lv, Yongming Liu, Xiaoman Fan, Xiaoxing Zhang, Wei School of Physics Liaoning University Shenyang110036 China Liaoning Key Laboratory of Optoelectronic Functional Devices and Detection Technology Shenyang110036 China Liaoning Key Laboratory of Semiconductor Light Emitting and Photocatalytic Materials Liaoning University Shenyang110036 China School of Public Health China Medical University Shenyang110122 China

Flexible strain sensors have attracted significant research interest in the fields of health detection, human-machine interaction, and electronic skin by virtue of excellent stretchability, flexibility, skin conformability, and outstanding sensing ability. Despite recent advances in this field, it remains challenging to achieve high-performance strain sensors with high sensitivity, wide strain range, and strong stability. To address this, we innovatively fabricated a high-performance polydimethylsiloxane (PDMS)/MXene/reduced graphene oxide (rGO) strain sensor with excellent strain sensing and superhydrophobicity using a tilt-filtration method and pre-stretching technique, featuring the novel gradient micro-wrinkle structure induced by thickness variation. Owing to the synergistic effect between the material and the microstructure, the sensor exhibits high sensitivity (gauge factor (GF) maximum up to 136,124.40), a wide strain range (up to 300%), and good stability (up to 10,500 cycles). This strain sensor can detect a wide range of human body movements, including large-scale movements and subtle stimuli. Additionally, the strain sensor is accompanied by a rough surface structure and low surface energy, endowing it with superhydrophobicity and corrosion resistance, which can be applied in harsh environments. The gradient micro-wrinkle strain sensors have the potential for practical applications in health detection, electronic skin, and human-machine interaction. © 2024, The Authors. All rights reserved.

关键词： Graphene

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Underwater imaging based on time-of-flight cameras 8

Underwater imaging based on time-of-flight cameras

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8th Symposium on Novel photoelectronic detection technology and Applications

作者： Liang, Hong Yu Cui, Yu Lin Wang, Yan Qiu Zheng, Fu Chen, Xi Hao Sun, Zhi Bin Key Laboratory of Optoelectronic Devices and Detection Technology College of Physics Liaoning University Shenyang110036 China National space science center Chinese academy of sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100190 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

Underwater imaging plays an important role in marine geological exploitation, resource exploitation, ecological research and many other fields. Due to the influence of complex underwater environment, the underwater images have some degradation problems, such as low contrast, high scattering noise and so on. Therefore, the improvement of underwater imaging quality is of great significance in any actual application. In this paper, an imaging experiment for the underwater targets is performed by utilizing a time-of-flight (TOF) camera combining with an underwater physical imaging model and an image enhancement method, where the advantage of the TOF camera directly obtaining the depth map can be full taken to calculate the unknown parameters in the underwater physical imaging model. The results show that the better TOF underwater images can be achieved, which can be verified in the feature point matching. Compared with other imaging systems, the TOF underwater imaging method proposed here has much better characteristics in high anti-jamming capability, high sensitivity, all-weather operation and so on. © 2022 SPIE

关键词： Image enhancement

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Super-resolution filtered ghost imaging with compressed sensing

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Chinese Physics B 2020年第12期29卷 119-124页

作者： Shao-Ying Meng Wei-Wei Shi Jie Ji Jun-Jie Tao Qian Fu Xi-Hao Chen Ling-An Wu Key Laboratory of Optoelectronic Devices and Detection Technology School of PhysicsLiaoning UniversityShenyang 110036China Institute of Physics Chinese Academy of SciencesBeijing 100190China

A filtered ghost imaging(GI)protocol is proposed that enables the Rayleigh diffraction limit to be exceeded in an intensity correlation system;a super-resolution reconstructed image is achieved by low-pass filtering of the measured *** a lensless GI experiment performed with spatial bandpass filtering,the spatial resolution can exceed the Rayleigh diffraction bound by more than a factor of *** resolution depends on the bandwidth of the filter,and the relationship between the two is investigated and *** combination with compressed sensing programming,not only high resolution can be maintained but also image quality can be improved,while a much lower sampling number is sufficient.

关键词： ghost imaging bandpass filtering compressed sensing super resolution

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Physics-driven generative adversarial networks empower single-pixel infrared hyperspectral imaging

arXiv

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arXiv 2023年

作者： Wang, Dong-Yin Bie, Shu-Hang Chen, Xi-Hao Yu, Wen-Kai Key Laboratory of Optoelectronic Devices and Detection Technology School of Physics Liaoning University Shenyang110036 China Center for Quantum Technology Research Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of Education School of Physics Beijing Institute of Technology Beijing100081 China

A physics-driven generative adversarial network (GAN) was established here for single-pixel hyperspectral imaging (HSI) in the infrared spectrum, to eliminate the extensive data training work required by traditional data-driven model. Within the GAN framework, the physical process of single-pixel imaging (SPI) was integrated into the generator, and the actual and estimated one-dimensional (1D) bucket signals were employed as constraints in the objective function to update the network’s parameters and optimize the generator with the assistance of the discriminator. In comparison to single-pixel infrared HSI methods based on compressed sensing and physics-driven convolution neural networks, our physics-driven GAN-based single-pixel infrared HSI can achieve higher imaging performance but with fewer measurements. We believe that this physics-driven GAN will promote practical applications of computational imaging, especially various SPI-based techniques. Copyright © 2023, The Authors. All rights reserved.

关键词： Hyperspectral imaging

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Targeting stability: Recent progress and perspectives on both anode and cathode interface of halide solid electrolytes

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Journal of Energy Chemistry 2025年 109卷 497-517页

作者： Nan Zhang Xing-Qi Chen Xiaoting Lin Peng-Fei Wang Zong-Lin Liu Jie Shu Ping He Ting-Feng Yi School of Materials Science and Engineering Northeastern University Shenyang Liaoning 110819 PR China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and Materials Northeastern University at Qinhuangdao Qinhuangdao Hebei 066004 PR China Department of Mechanical and Materials Engineering University of Western Ontario 1151 Richmond St London Ontario N6A 3K7 Canada Faculty of Materials Science and Chemical Engineering and Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province Ningbo University Ningbo Zhejiang 315211 PR China Center of Energy Storage Materials & Technology College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210093 PR China

Halide solid-state electrolytes (SSEs) have become a new research focus for all-solid-state batteries because of their significant safety advantages, high ionic conductivity, high-voltage stability, and good ductility. Nonetheless, stability issues are a key barrier to their practical application. In past reports, the analysis of halide electrolyte stability and its enhancement methods lacked relevance, which limited the design and optimization of halide solid electrolytes. This review focus on stability issues from a chemical, electrochemical, and interfacial point of view, with particular emphasis on the interaction of halide SSEs with anode and cathode interfaces. By focusing on innovative strategies to address the stability issue, this paper aims to further deepen the understanding and development of halide all-solid-state batteries by proposing to focus research efforts on improving their stability in order to address their inherent challenges and match higher voltage cathodes, paving the way for their wider application in the next generation of energy storage technologies.

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Dynamical instability and adiabatic evolution of the atom-homonuclear-trimer dark state in a condensate system

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Chinese Physics B 2009年第9期18卷 3844-3849页

作者：孟少英吴炜刘彬叶地发傅立斌 Graduate School China Academy of Engineering Physics Department of Physics Municipal Key Laboratory of Photoelectronic Devices and Detection TechnologyLiaoning University Institute of Applied Physics and Computational Mathematics

This paper investigates the dynamical instability and adiabatic evolution of the atom homonuclear-trimer dark state of a condensate system in a stimulated Raman adiabatic passage aided by Feshbach resonance. It obtains analytically the regions for the appearance of dynamical instability caused by the interparticle interactions. Moreover, the adiabatic property of the dark state is also studied in terms of a newly defined adiabatic fidelity. It shows that the nonlinear collisions have a negative effect on the adiabaticity of the dark state and hence reduce the conversion efficiency.

关键词： stimulated Raman adiabatic passage dark state dynamical instability adiabatic evolution

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Laser and Plasma Nitriding of Titanium in the Atmosphere Environment

Laser and Plasma Nitriding of Titanium in the Atmosphere Env...

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Photonics and Optoelectronics, SOPO

作者： Hanjiang Yu Fengjiu Sun Department of Physics Liaoning Key Laboratory of Photoelectronic Devices and Detection Technology Liaoning University Shenyang China College of Sciences Northeastern University Shenyang China

Laser nitriding is an attractive method to improve metal surface properties, such as hardness, wear, and corrosion resistance, with the advantage of simple experimental setup, rapid treatment, and precise process control. Here, titanium nitride was obtained in the atmosphere using a newly developed technique-a mixing technology of laser and plasma nitriding (LPN)-in order to enhance the titanium tribological properties. In addition to the experiments with LPN, also the results of the traditional technique of laser nitriding (LN) and a mixing technology of laser and pre-heated nitrogen (LHN) were presented. It has been shown that the LPN nitriding efficiency was better compared to LN and LHN. Moreover, the phase formation of titanium nitride was given at different laser energy densities with emphasis on the mixing technology with laser and plasma.

关键词： Titanium Atmosphere Plasma properties Surface resistance Surface treatment Surface emitting lasers Corrosion Process control Nitrogen Plasma density

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