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Fourier Transform Spectroscopy, FTS 2019

作者： Ren, Chen Cong, Gao Lei, Liu Jianwen, Hua Lei, Ding Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China Key Laboratory of Infrared System Detection and Imaging Technology Chinese Academy of Sciences Shanghai200083 China University of Chinese Academy of Sciences Beijing100049 China College of Meteorology and Oceanography National University of Defense Technology Nanjing211101 China

This paper introduced a three-dimensional(3D) Space-ground atmospheric observation system, which is based on interference optics technology. It is used to detect the three-dimensional distribution and change of atmosp... 详细信息

ISBN: (纸本)9781943580613

关键词： Atmospheric humidity

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Simulation Research on Laser Transmission Characteristics in Inclined Turbulent Atmosphere 2

Simulation Research on Laser Transmission Characteristics in...

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2nd International Conference on Laser, Optics and Optoelectronic technology, LOPET 2022

作者： Yang, Xiaoce Wang, Chunyang Xi＇an Key Laboratory of Active Photoelectric Imaging Detection Technology Xi'an Technological University Xi'an710021 China School of Optoelectronic Engineering Xi'an Technological University Xi'an710021 China

ISBN: (纸本)9781510657588

In this paper, a simulation experiment is done to study the influence of atmospheric turbulence on the laser beam in the process of oblique transmission. The horizontal random atmospheric turbulence phase screen group is generated by using the power spectrum inversion method plus sub-harmonic compensation method, and the position distribution of the phase screen on the inclined transmission path is corrected by combining the atmospheric refractive index structure parameters that vary with height. Atmospheric turbulence phase screen set suitable for simulating slant laser transmission. Through simulation, the far-field light intensity distribution of the inclined transmission phase screen group and the horizontal transmission phase screen group is compared. The results show that, compared with the horizontal atmospheric turbulence phase screen group that does not consider the atmospheric refractive index structure parameter changing with height, the far-field light spot of the laser beam after passing through the oblique transmission phase screen group is more obvious, and the light intensity attenuation is more serious. The modified slope phase screen group is more accurate in simulating the effect of atmospheric turbulence on the laser beam. © 2022 SPIE.

关键词： Atmospheric turbulence

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Preparation of AlN film grown on sputter-deposited and annealed AlN buffer layer via HVPE

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Chinese Physics B 2021年第3期30卷 430-435页

作者： Di-Di Li Jing-Jing Chen Xu-Jun Su Jun Huang Mu-Tong Niu Jin-Tong Xu Ke Xu Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of SciencesSuzhou 215123China Suzhou Nanowin Science and Technology Co. Ltd.Suzhou 215123China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China

AlN films grown on sputter-deposited and annealed AlN buffer layer by high temperature hydride vapor phase epitaxy(HVPE)have been fabricated and structurally *** crystalline quality and surface morphology of as-grown AlN films with various V/III ratios were studied and *** XRD results showed that the crystalline quality of the AlN film could be optimized when the growth V/III ratio was *** the same time,the full width at half-maximum(FWHM)values of(0002)-and(10¯12)-plane were 64 arcsec and 648 arcsec,*** revealed by AFM,the AlN films grown with higher V/III ratios of 150 and 300 exhibited apparent hillock-like surface structure due to the low density of screw threading dislocation(TD).The defects microstructure and strain field around the HVPE-AlN/sputtered-AlN/sapphire interfaces have been investigated by transmission electron microscopy(TEM)technique combined with geometric phase analysis(GPA).It was found that the screw TDs within AlN films intend to turn into loops or half-loops after originating from the AlN/sapphire interface,while the edge ones would bend first and then reacted with others within a region of 400 nm above the ***,part of the edge TDs propagated to the surface *** GPA analysis indicated that the voids extending from sapphire to HVPE-AlN layer were beneficial to relax the interfacial strain of the best quality AlN film grown with a V/III ratio of 150.

关键词： hydride vapor phase epitaxy(HVPE) AlN threading dislocation(TD) sputter-deposition

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Design, performance and in-orbit evaluation results of Tiangong-2 wide-band imaging spectrometer

Design, performance and in-orbit evaluation results of Tiang...

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Tiangong-2 Remote Sensing Application Conference on technology, Method and Application

作者： Wei, Jun Ding, Lei He, Xianqiang Tang, Yuyu Feng, Xin Lin, Mingsen Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography SOA Hangzhou310012 China National Satellite Ocean Application Service SOA Beijing100081 China Key Laboratory of Infrared System Detection and Imaging Technology Chinese Academy of Sciences Shanghai200083 China

ISBN: (纸本)9789811335006

The system design, performance and in-orbit evaluations of a push-broom wide-band imaging spectrometer (WIS) on Tiangong-2 space laboratory is introduced. The WIS has 100 m spatial resolution in ocean color bands (FOV is around 42°), which is the highest compared to other in-orbit ocean color sensors (GOCI, MODIS, VIIRS, and OLCI). Besides, WIS includes visible and near infrared (VNIR), shortwave infrared (SWIR) and thermal infrared (TIR) channels and has excellent performance in ocean color monitoring, and SNR in 0.4–0.8 μm is more than 400 at typical oceanic radiance. Average SNR at SWIR is more than 550 at typical atmosphere radiance. Moreover, the instrument’s average NE⊿T at TIR is lower than 20 mK, which is one of the best. The in-orbit tests reveal that the ocean color components retrieved by WIS are highly consistent with the results from the typical ocean color satellite sensors (MODIS, VIIRS and GOCI), but have finer structures due to higher spatial resolution. © Springer Nature Singapore Pte Ltd. 2019.

关键词： Dewars

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Atmospheric Pollution Monitoring Based on Fourier Transform infrared Spectrometer

Atmospheric Pollution Monitoring Based on Fourier Transform ...

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Optical imaging and Measurement (ICOIM), International Conference of

作者： Jun Sun Zhijing Xu Yinghui Lin Ren Chen Zhanhu Wang College of Information Engineering Shanghai Maritime University Shanghai China Chinese Academy of Sciences Shanghai Institute of Technical Physics State Key Laboratory of Infrared Physics Key Laboratory of Infrared System Detection and Imaging Technology Shanghai China

Air pollution has serious impacts on human health and the environment, thus accurate monitoring and analysis of air pollutants is of vital importance. As an efficient monitoring technology, the Fourier Transform infrared Spectrometer has played a wide role in the study of air pollution. This paper elaborates on the basic principles and working mechanisms of the Fourier Transform infrared Spectrometer and discusses the important role in air pollution monitoring, also analyzes the development trend of the Fourier Transform infrared Spectrometer in air monitoring.

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Microfluidics-based strategies for molecular diagnostics of infectious diseases

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Military Medical Research 2022年第6期9卷 727-753页

作者： Xin Wang Xian-Zhe Hong Yi-Wei Li Ying Li Jie Wang Peng Chen Bi-Feng Liu The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics&Molecular Imaging Key Laboratory Systems Biology ThemeDepartment of Biomedical EngineeringCollegeof Life Science and TechnologyHuazhong University of Scienceand TechnologyWuhan 430074China State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics Wuhan National Laboratory for OptoelectronicsNational Centre for Magnetic Resonancein WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences-Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430071China Department of Radiology Canary Center at Stanford for Cancer Early DetectionSchool of MedicineStanford UniversityPalo AltoCA 94304USA

Traditional diagnostic strategies for infectious disease detection require benchtop instruments that are inappropriate for point-of-care testing(POCT). Emerging microfluidics, a highly miniaturized, automatic, and integrated technology,are a potential substitute for traditional methods in performing rapid, low-cost, accurate, and on-site *** diagnostics are widely used in microfluidic devices as the most effective approaches for pathogen *** review summarizes the latest advances in microfluidics-based molecular diagnostics for infectious diseases from academic perspectives and industrial outlooks. First, we introduce the typical on-chip nucleic acid processes,including sample preprocessing, amplification, and signal read-out. Then, four categories of microfluidic platforms are compared with respect to features, merits, and demerits. We further discuss application of the digital assay in absolute nucleic acid quantification. Both the classic and recent microfluidics-based commercial molecular diagnostic devices are summarized as proof of the current market status. Finally, we propose future directions for microfluidics-based infectious disease diagnosis.

关键词： Microfluidics Molecular diagnostics Infectious disease Point-of-care testing(POCT) Digital assay

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Real Aperture and Synthetic Aperture Joint imaging Approach for Vehicle-mounted Forward Look Radar 6

Real Aperture and Synthetic Aperture Joint Imaging Approach ...

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6th International Conference on Signal and Image Processing, ICSIP 2021

作者： Liu, Huixin Gao, Lili Shi, Tianyue Mao, Xinhua Nanjing University of Aeronautics and Astronautics Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education Nanjing China Beijing Institute of Control and Electronic Technology RandD Center For Artificial Intelligence and Detection Technology Beijing China

ISBN: (纸本)9780738133737

The vehicle-mounted millimeter-wave forward-looking imaging is a research hotspot in the radar field recently. If imaging is done only through the real aperture, the azimuth resolution of the radar will be still greatly restricted for the limitation of the aperture size. Considering the movement of the car itself, the synthetic aperture principle can be used to improve the azimuth resolution. However, synthetic aperture radar cannot completely solve the problem due to the blind area and left-right blurring of forward-looking area imaging (a small angular range directly in front). To this end, a new real aperture synthetic aperture joint imaging method is proposed, in which the real aperture can solve the problem of radar left and right blur, and can image at the forward-looking area. For the squint area, the length of the synthetic aperture is often longer than the real aperture, so higher resolution can be obtained by using synthetic aperture processing. Finally, the simulation results demonstrate the correctness of the back projection algorithm used in this vehicle-mounted forward look radar. © 2021 IEEE.

关键词： Vehicles

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CDP-GAN:Near-infrared and Visible Image Fusion Via Color Distribution Preserved GAN

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1698-1701页

作者： Jun Chen Kangle Wu Yang Yu Linbo Luo the School of Automation Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex SystemsEngineering Research Center of Intelligent Technology for Geo-ExplorationMinistry of EducationChina University of GeosciencesWuhan 430074China the Shanghai Institute of Technical Physics Key Laboratory of Infrared System Detecting and Imaging TechnologyChinese Academy of SciencesShanghai 200083China the School of Mechanical Engineering and Electronic Information China University of GeosciencesWuhan 430074China

Dear Editor,This letter is concerned with dealing with the great discrepancy between near-infrared(NIR)and visible(VS)image fusion via color distribution preserved generative adversarial network(CDP-GAN).Different from the global discriminator in prior GAN,conflict of preserving NIR details and VS color is resolved by introducing an attention guidance mechanism into the ***。

关键词： details dealing preserving

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Nonlinear Correction Approach for FMCW Radar based on Spectrum Recovery 6

Nonlinear Correction Approach for FMCW Radar based on Spectr...

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6th International Conference on Signal and Image Processing, ICSIP 2021

作者： Liu, Yanqi Gao, Lili Shi, Tianyue Mao, Xinhua Nanjing University of Aeronautics and Astronautics Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education Nanjing China Beijing Institute of Control and Electronic Technology RandD Center For Artificial Intelligence and Detection Technology Beijing China

ISBN: (纸本)9780738133737

There are two basic approaches for LFM (linear frequency modulation) signal pulse compression - matched filtering and Dechrip. For high-resolution imaging of small scenes, Dechirp is much more popular because it requires a lower sampling rate. However, the transmission signal of demodulation needs to be an ideal chirped signal for Dechirp. When linear modulation cannot be guaranteed accurately, the compression result will be spatially defocused, which causes the compensation complicated. This paper first derives the equivalence of matched filtering and Dechirp processing. Then, for the Dechirp received signal, this paper proposes a pulse compression method for nonlinear FM signals based on matched filtering without upsampling. Finally, the feasibility of the method was verified through experiments. © 2021 IEEE.

关键词： Frequency modulation

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Consistent Transfer Radiometric Calibration technology for Optical Remotely Sensor and Field Campaign Validation

Consistent Transfer Radiometric Calibration Technology for O...

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Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS

作者： Ning Wang Yonggang Qian Lingling Ma Yinnian Liu Yaokai Liu Yongguang Zhao Chuanrong Li Lingli Tang Key Laboratory of Quantitative Remote Sensing Information Technology Academy of Opto-Electronics Beijing China Key Laboratory of Infrared System Detection and Imaging Technologies Shanghai Institute of Technical Physics Shanghai China

ISBN: (纸本)9781728152950

To accurately calibrate the remotely sensed data becomes one of the primary problems for different application of remote sensing. In this paper, consistent transfer radiometric calibration technology is proposed, and the related system composed of standard ground-based and airborne hyperspectral imagers with self-calibrator units, comprehensive references including different types of artificial targets and natural scenes, and benchmark transfer method have been developed. The uncertainty of this system has also been analyzed and an uncertainty of less than 4.5% could be reached by this system. To validate this system, a flight campaign taking place in National High-Resolution Comprehensive Calibration Site of China has been carried out, the results show that the ground-based and air-flight benchmarks were agree with the satellite measurement.

关键词： Calibration Benchmark testing Uncertainty Radiometry Hyperspectral imaging Atmospheric modeling Atmospheric measurements

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