A5083435948- Orbital Angular Momentum in Optics
- Optical Polarization and Ellipsometry
- Near-Field Optical Microscopy
- Random lasers and scattering media
- Calibration and Measurement Techniques
- Atmospheric aerosols and clouds
- Remote Sensing in Agriculture
- Infrared Target Detection Methodologies
- Optical Wireless Communication Technologies
- Remote-Sensing Image Classification
- Metamaterials and Metasurfaces Applications
- Atmospheric Ozone and Climate
- Advanced Image Fusion Techniques
- Spectroscopy and Chemometric Analyses
- Laser-Matter Interactions and Applications
- Metabolism, Diabetes, and Cancer
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Satellite Image Processing and Photogrammetry
- Liver Disease Diagnosis and Treatment
- Radio Astronomy Observations and Technology
- Marine and coastal ecosystems
- Hepatitis C virus research
- Radio Wave Propagation Studies
- Optical Systems and Laser Technology
Chinese Academy of Sciences
2016-2025
Hefei Institutes of Physical Science
2016-2025
Anhui Institute of Optics and Fine Mechanics
2018-2024
Aerospace Information Research Institute
2023
Satellite Environment Center
2023
Ministry of Ecology and Environment
2023
Jilin University
2022-2023
Hangzhou Institute of Applied Acoustics
2022
Institute of Applied Technology
2016
Nanjing University of Science and Technology
2010-2014
In remote sensing single-image dehazing (RSSID), adjacency effects and the multi-scale characteristics of land surface–atmosphere system highlight importance a network’s effective receptive field (ERF) its ability to capture features. Although hybrid models combining convolutional neural networks Transformers show promise, quadratic complexity Transformer complicates balance between ERF efficiency. Recently, Mamba achieved global with linear excelled in modeling long-range dependencies, yet...
Spectroscopic data often suffers from spectral distortions due to the broadening effects of spectrometer. In this paper, issue bandwidth correction is transformed into a multiparameter optimization problem, and an improved method based on Levenberg-Marquardt algorithm with Tikhonov regularization presented. Example LED, Raman, compact fluorescent lamp spectra were corrected proposed method, Richardson-Lucy maximum posterior errors runtimes under same stopping conditions each compared. The...
Image registration is a crucial preprocessing step in remote sensing applications, integrating information from multiple images to achieve synergistic advantages. Nevertheless, aerosols characterized by spatiotemporal heterogeneity can result the blurring of remote-sensing images, thereby compromising accuracy image registration. This paper begins analyzing basic principles atmospheric correction and The variations radiative contribution caused aerosol changes real-world scenarios were...
To improve the success rate of target detection, a fusion method that comprises polarimetric feature extractor and deep convolutional neural network (CNN) with consecutive small (2 × 2) convolutions (or, CSC-CNN for simplicity) is proposed. First, we theoretically analyse dispersion characteristics on surface based concept information entropy, it concluded measure can be selected as relevant images. Then, introduced conveniently calculating measures fewer prior parameters in outdoor...
The directional polarimetric camera (DPC) is a Chinese satellite sensor with large field of view (FOV) (±50° both along-track and cross-track) high spatial resolution (about 3.3 km at nadir) that operates in sun-synchronous orbit. It difficult task to calibrate the in-flight relative radiometric variation sensors such wide FOV. In this study, new method based on Rayleigh scattering over ocean developed estimate sensitivity whole FOV DPC. Firstly, theoretical uncertainty analyzed response....
Within the validity of first-order Born approximation, expressions are derived for correlation between intensity fluctuations (CIF) an electromagnetic plane wave scattered from a spatially quasi-homogeneous (QH), anisotropic medium. Upon establishing matrix scattering potential medium, we show that CIF is summation Fourier transforms strengths and normalized coefficients (NCCs) matrix. Numerical results reveal susceptible to effective width length degree polarization incident wave. Our study...
Based on the extended Huygens-Fresnel principle and generalized Stokes theory, evolution of polarization properties beams generated by quasi-homogenous (QH) sources propagating in clear oceanic water was studied use turbulence spatial spectrum function. The results show that have similar self-reconstructed behavior under different conditions far field, but if propagation distance is not long enough, degree (DOP) fluctuates with much more complexity than state (SOP) QH beams. ability DOP at...
The directional polarimetric camera is a polarization sensor that offers an ultrawide angle and low-distortion imaging. Stray light one of the important factors affecting accuracy its measurement. In this paper, stray first divided into local global according to characteristics optical system, causes two kinds are analyzed. Second, novel deconvolution method proposed correct light, matrix extended 2D form light. Finally, image acquisition correction laboratory experiments integrating sphere...
Polarimetric imaging detection is a relatively new and largely undeveloped field. Although convolutional neural networks (CNNs) have achieved great success in two-dimensional (2D) normal intensity images the field of target detection, traditional CNN methods not been widely applied to optical polarimetric images, they cannot take full advantage connection between different images. To solve this problem, three-dimensional (3D) convolutions are adopted consider relationship S0, S1, S2 as third...
The directional polarimetric camera (DPC) is a remote-sensing instrument for the characterization of atmospheric aerosols and clouds by simultaneously conducting spectral, angular, measurements. Polarization measurement accuracy an important index to evaluate performance DPC mainly related calibration instrumental parameters. In this paper, firstly, relationship between polarization parameter errors caused nonideality components are analyzed, maximum error in central field view edge after...
The directional polarimetric camera (DPC) is a polarization sensor with ultra-wide-angle and low-distortion imaging characteristics. Geometric calibration usually the first essential step before remote sensing satellites are launched. In this paper, geometric method based on two-dimensional turntable rotation matrix high precision, simple operation, wide application range proposed for camera. Instead of precisely adjusting position turntable, effectively eliminates errors caused by...
The diffraction of Gaussian vortex beams in uniaxial crystals orthogonal to the optical axis is studied. Analytical expressions for components field are derived and illustrated by numerical examples. Results indicate that, upon inside crystals, transversal longitudinal electric fields would vary show different characteristics. Effects anisotropic on intensity distributions also investigated. It demonstrates diffraction, be distorted rotated into elliptical profiles with variation ratio...
This paper describes the concept of cross-spectrally pure light, implications statistical similarity an optical field on its cross-spectral purity and fields. First, light is analysed in space-frequency domain by taking into account vectorial nature radiation, conditions reduction formula are obtained. Then, utilizing similarity, relationship between spatial coherence explored electromagnetic field. Last, for fields discussed, polychromatic plane wave far produced a planar, secondary,...
The Polarization CrossFire (PCF) suite onboard the Chinese GaoFen-5(02) satellite has been sophisticatedly composed by Particulate Observing Scanning Polarimeter (POSP) and Directional Polarimetric Camera (DPC). Among them, DPC is a multi-angle sequential measurement polarization imager, while POSP cross-track scanning simultaneous polarimeter with corresponding radiometric polarimetric calibrators, which can theoretically be used for cross comparison calibration DPC. After data...
Abstract Based on the vector angular spectrum representation and method of stationary phase, vectorial structural characteristics a higher-order cosh-Gaussian (HOCG) beam in far field are investigated. Analytical expressions for energy flux distributions TE term, TM term whole derived illustrated by numerical examples. Influences orders cosh parameters analyzed, respectively. Furthermore, discrepancy total between non-paraxial paraxial cases is presented analytical explanations phenomenon...
The concept of partially coherent four-petal Gaussian (PCFPG) beam is introduced and described in analytical forms. Based on the Huygens-Fresnel integral formula, average intensity spreading turbulent atmosphere are derived expressions. Efiects parameters atmospheric structure constant distributions efiective sizes investigated detail, respectively. Results show that PCFPG beams carrying larger coherence lengths or higher orders would be less afiected by turbulence. It also indicated that,...