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Principle of subtraction ghost imaging in scattering medium

Chinese Physics B 2023年第6期32卷 250-254页

作者：付芹白艳锋谭威黄贤伟南苏琴傅喜泉 College of Computer Science and Electronic Engineering Hunan UniversityChangsha 410082China School of Computer and Information Engineering Hunan University of Technology and BusinessChangsha 410205China

scattering medium in light path will cause distortion of the light field,resulting in poor signal-to-noise ratio(SNR)of ghost *** disturbance is usually eliminated by the method of *** deduce the intensity fluctuation correlation function of the ghost imaging with the disturbance of the scattering medium,which proves that the ghost image consists of two correlated results:the image of scattering medium and the target *** effect of the scattering medium can be eliminated by subtracting the correlated result between the light field after the scattering medium and the reference light from ghost image,which verifies the theoretical *** research may provide a new idea of ghost imaging in harsh environment.

关键词： ghost imaging image reconstruction techniques scattering medium

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Exploiting the point spread function for optical imaging through a scattering medium based on deconvolution method

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Journal of Innovative Optical Health Sciences 2019年第4期12卷 21-31页

作者： Hexiang He Xiangsheng Xie Yikun Liu Haowen Liang Jianying Zhou School of Physics and Optoelectronic Engineering Foshan University Foshan 528000 P.R.China Department of Physics College of Science Shantou University Shantou 515063P.R.China School of Physics Sun Yat-sen University Guangzhou 510275 P.R.China

Visual perception of humans penetrating turbid medium is hampered by *** techniques have been prompted recently to recover optical imaging through turbid *** them,speckle correlation based on deconvolution is one of the most attractive methods taking advantage of high imaging quality,robustness,eas-of-use,and *** exploiting the point spread function(PSF)of the scattering system,large Field-of-View,extended Depth-of-Field,noninvasiveness and spectral resoluation are now available as successful solutions for high quality and multifunctional image *** this paper,we review the progress of imaging through a scattering medium based on deconvolution method,including the principle,the breakthrough of the limitation of the optical memory ffect,the improvement of the deconvolution algorithm and innovative applications.

关键词： Speckle correlation deconvolution scattering medium imaging through turbid media

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Imaging through scattering layers using a near-infrared low-spatial-coherence fiber random laser

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Chinese Physics B 2024年第10期33卷 226-232页

作者： Anda Shi Zeyu Wang Chenxi Duan Zhao Wang Weili Zhang School of Information and Communication Engineering University of Electronic Science&Technology of ChinaChengdu 611731China Yingcai Honors College University of Electronic Science&Technology of ChinaChengdu 611731China

Optical memory effect-based speckle-correlated technology has been developed for reconstructing hidden objectsfrom disordered speckle patterns,achieving imaging through scattering ***,the lighting efficiency and fieldof view of existing speckle-correlated imaging systems are ***,a near-infrared low spatial coherence fiberrandom laser illumination method is proposed to address the above *** the utilization of random Rayleighscattering within dispersion-shifted fibers to provide feedback,coupled with stimulated Raman scattering for amplification,a near-infrared fiber random laser exhibiting a high spectral density and extremely low spatial coherence is *** on the designed fiber random laser,speckle-correlated imaging through scattering layers is achieved,with highlighting efficiency and a large imaging field of *** work improves the performance of speckle-correlated imagingand enriches the research on imaging through scattering medium.

关键词： fiber random laser speckle-correlated imaging scattering medium spatial coherence

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Different channels to transmit information in scattering media

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PhotoniX 2023年第1期4卷 545-557页

作者： Xuyu Zhang Jingjing Gao Yu Gan Chunyuan Song Dawei Zhang Songlin Zhuang Shensheng Han Puxiang Lai Honglin Liu Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Engineering Research Center of Optical Instrument and System The Ministry of EducationShanghai Key Laboratory of Modern Optical SystemsUniversity of Shanghai for Science and TechnologyShanghai 200093China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Hangzhou Institute for Advanced study University of Chinese Academy of SciencesHangzhou 310024China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000China Photonics Research Institute The Hong Kong Polytechnic UniversityHong Kong SARChina

A communication channel should be built to transmit information from one place to *** is 2 or higher dimensional information ***,an imaging channel comprises a lens with free space at its both sides,whose transfer function is usually known and hence the response of the imaging channel can be well *** the lens with a thin scattering medium,the image can still be extracted from the detected optical field,suggesting that the scattering medium retains or reconstructs not only energy but also information transmission *** by deep learning,we find that unlike the lens system,there are different channels in a scattering medium:the same scattering medium can construct different channels to match the manners of source ***,it is found that without a valid channel,the convolution law for a spatial shift-invariant system(the output is the convolution of the point spread function and the input object)is broken,and in this scenario,information cannot be transmitted onto the detection ***,valid channels are essential to transmit information through even a spatial shift-invariant *** findings may intrigue new adventures in imaging through scattering media and reevaluation of the known spatial shift-invariance in various areas.

关键词： Channels scattering medium Point spread function Deep learning Spatial shift-invariant system

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