Mr. Xiaofeng Bai Profile

Xiaofeng Bai

at North Night Vision Technology Co Ltd

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Author

Publications (30)

Proceedings Article | 13 December 2024 Paper

A way to measure the target contrast in low light level based on image intensifier technology

Xiaofeng Bai, Zhong Hu, Feng Shi, Zhiwei Zuo, Qin Zhang, Shijun Yan

Proceedings Volume 13498, 1349805 (2024) https://doi.org/10.1117/12.3046226

KEYWORDS: Calibration, Image intensifiers, Light sources and illumination, Camouflage, Testing and analysis, Measurement devices, Imaging systems, Image sensors, Charge-coupled devices, Spectral response

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Proceedings Article | 16 December 2022 Paper

Detection and azimuth information display of infrared moving targets

Yefei Li, Xiangyu Kong, Lei Liu, Xiaofeng Bai

Proceedings Volume 12324, 123240P (2022) https://doi.org/10.1117/12.2646998

KEYWORDS: Target detection, Detection and tracking algorithms, Infrared detectors, Infrared radiation, Infrared imaging, Global Positioning System, Video, Statistical modeling, Field programmable gate arrays, 3D acquisition

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Proceedings Article | 27 March 2022 Paper

Measuring equivalent background illumination of image intensifier assembly by low light level illuminometer

Xiaofeng Bai, Yue Su, Hongchang Cheng, Zhoukui Li, Shuning Yang, Qin Zhang, Xiaogang Dang, Junguo Li, Kun Han

Proceedings Volume 12169, 121690I (2022) https://doi.org/10.1117/12.2619771

KEYWORDS: Image intensifiers, Distance measurement, Gallium nitride, Gallium arsenide, Aluminum, Error analysis, Image processing, Solids, Target recognition, Lithium

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Proceedings Article | 5 November 2020 Paper

Algorithm research on image processing for crack identification of round wood

Xiaogang Dang, Xiaofeng Bai, Xulang Chen, Lu Han, Lei Wang, Kun Han, Shuning Yang, Wei Cheng

Proceedings Volume 11567, 1156714 (2020) https://doi.org/10.1117/12.2576388

KEYWORDS: Image processing, Image enhancement, Image filtering, Detection and tracking algorithms, Electronic filtering, Digital filtering, Nonlinear filtering, Image quality, Feature extraction

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Proceedings Article | 5 November 2020 Paper

Uncertainty for measuring the luminance gain of low light level image intensifier assembly

Xiaofeng Bai, Kun Han, Shuning Yang, Junguo Li, Xiaogang Dang, Wei Cheng, Xulang Chen, Lei Wang

Proceedings Volume 11567, 115670M (2020) https://doi.org/10.1117/12.2575442

KEYWORDS: Image intensifiers, Measurement devices, Light sources, Light, Error analysis, Time metrology, Infrared technology, Image enhancement, Integrating spheres, Lamps

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Proceedings Article | 17 April 2020 Paper

Measurement error of MCP current gain of low-light-level image intensifier

Shuning Yang, Ze Yao, Wujun Huang, Yingpin He, Kun Han, Wei Cheng, Xiaofeng Bai, Qingyun Meng

Proceedings Volume 11455, 114554K (2020) https://doi.org/10.1117/12.2564977

KEYWORDS: Microchannel plates, Image intensifiers, Error analysis, Light sources, Calibration, Measurement devices, Image filtering, Image processing, Precision measurement, Light

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Proceedings Article | 17 April 2020 Paper

Design of hardware system for low-illumination ICMOS camera based on FPGA

Yizheng Lang, Yunsheng Qian, Xiaofeng Bai, Ze Yao

Proceedings Volume 11455, 114550W (2020) https://doi.org/10.1117/12.2559830

KEYWORDS: Field programmable gate arrays, Cameras, Organic light emitting diodes, Signal processing, Image processing, Night vision, Imaging systems, Digital signal processing, Image sensors, Image intensifiers

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Proceedings Article | 17 April 2020 Paper

Low-light-level image colorization based on Laws’ texture feature descriptor

Xiangyu Kong, Gangcheng Jiao, Xiaofeng Bai, Yunsheng Qian

Proceedings Volume 11455, 114550V (2020) https://doi.org/10.1117/12.2559800

KEYWORDS: Night vision, Image segmentation, Image processing, Image enhancement, Detection and tracking algorithms, Human vision and color perception, Visualization, Optical engineering

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Proceedings Article | 1 April 2020 Open Access

Application of scanning focused X-ray imaging positioning technique in preparation of GaAs photocathodes

Yijun Zhang, Chengwei Fang, Yunsheng Qian, Junju Zhang, Kaimin Zhang, Jingzhi Zhang, Minmin Rong, Feng Shi, Gangcheng Jiao, Xiaofeng Bai

Proceedings Volume 11367, 113671N (2020) https://doi.org/10.1117/12.2556086

KEYWORDS: Gallium arsenide, Chemical analysis, X-ray imaging, X-rays, Contamination

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Proceedings Article | 10 May 2019 Paper

Infrared-UV dual-band image fusion camera

Jiawei Shen, Yunsheng Qian, Suhan Ni, Yucheng Zhang, Gangcheng Jiao, Xiaofeng Bai

Proceedings Volume 11068, 110680R (2019) https://doi.org/10.1117/12.2523902

KEYWORDS: Image fusion, Ultraviolet radiation, Infrared imaging, Infrared radiation, Cameras, Infrared cameras, Thermography, Image processing, Coronagraphy, Data conversion

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Proceedings Article | 12 March 2019 Paper

Infrared and ICMOS image fusion camera

Suhan Ni, Yunsheng Qian, Jiawei Shen, Gangcheng Jiao, Xiaofeng Bai

Proceedings Volume 11023, 110230W (2019) https://doi.org/10.1117/12.2520709

KEYWORDS: Image fusion, Infrared imaging, Infrared radiation, Field programmable gate arrays, Infrared cameras, Staring arrays, Cameras, Night vision, Video

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Proceedings Article | 12 March 2019 Paper

The illuminometer based on low-light-level image intensifier

Xulang Chen, Xiaofeng Bai , Qingyun Meng, Bo Yan, Zhuang Miao

Proceedings Volume 11023, 110231Y (2019) https://doi.org/10.1117/12.2521925

KEYWORDS: Image intensifiers, Gallium arsenide, Night vision

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Proceedings Article | 12 March 2019 Paper

Measurement error of radiation gain of UV image intensifier

Shuning Yang, Ze Yao, Wujun Huang, Wei Cheng, Yingping He, Xiaofeng Bai, Qingyun Meng

Proceedings Volume 11023, 1102306 (2019) https://doi.org/10.1117/12.2516769

KEYWORDS: Ultraviolet radiation, Image intensifiers, Error analysis, Sensors, Power meters, Calibration, Ultraviolet detectors, Measurement devices, Optical filters, Transmittance

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Proceedings Article | 7 November 2018 Paper

Uncertainty of measurement for testing sensitivity of low light level image intensifier

Xiaofeng Bai, Hui Guo, Shuning Yang, Xulang Chen, Wujun Huang, Qingyun Meng, Yingping He

Proceedings Volume 10832, 108321G (2018) https://doi.org/10.1117/12.2511492

KEYWORDS: Image intensifiers, Error analysis, Electrodes, Light sources, Lamps, Light sources and illumination

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Proceedings Article | 20 February 2018 Paper

Test of contrast of object and background based on ICCD

Shaolin Zheng, Hongchang Cheng, Xiaofeng Bai, Yuan Yuan

Proceedings Volume 10697, 106972L (2018) https://doi.org/10.1117/12.2315588

KEYWORDS: Night vision systems, Image intensifiers, Night vision, Imaging systems, Camouflage, Transmittance, Objectives, Spatial frequencies, Atmospheric corrections, Reflectivity

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Proceedings Article | 20 February 2018 Paper

High performance organic ultraviolet photodetectors based on m-MTDATA

Zhongli Zhao, Xiaofeng Bai , Yubin Shang, Jikai Yang, Baozeng Li, De Song

Proceedings Volume 10697, 106970U (2018) https://doi.org/10.1117/12.2309749

KEYWORDS: Ultraviolet radiation, Photodetectors, Organic materials, Palladium, Excitons, Electrodes, Night vision, Signal to noise ratio, Aluminum, Absorption

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Proceedings Article | 13 April 2015 Paper

Research on mechanical vibration impacts of GaAs photocathode photoemission performance

Feng Shi, Hong-chang Cheng, Xiao-feng Bai, Lei Yan

Proceedings Volume 9522, 95220G (2015) https://doi.org/10.1117/12.2178699

KEYWORDS: Gallium arsenide, Image intensifiers, Quantum efficiency, Diffusion, Optoelectronic devices, Absorption, Cesium, Photomultipliers, MATLAB, Night vision

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Proceedings Article | 4 March 2015 Paper

The theoretical simulation on electrostatic distribution of 1st proximity region in proximity focusing low-light-level image intensifier

Liandong Zhang, Xiaofeng Bai, De Song, Shencheng Fu, Ye Li, Qingduo Duanmu

Proceedings Volume 9521, 952102 (2015) https://doi.org/10.1117/12.2087010

KEYWORDS: Microchannel plates, Image intensifiers, Night vision, Computer simulations, Finite element methods, Optical simulations, 3D modeling, Chemical elements, Image resolution, Electron beams

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Low-light-level night vision technology is magnifying low light level signal large enough to be seen by naked eye, which uses the photons - photoelectron as information carrier. Until the micro-channel plate was invented, it has been possibility for the realization of high performance and miniaturization of low-light-level night vision device. The device is double-proximity focusing low-light-level image intensifier which places a micro-channel plate close to photocathode and phosphor screen. The advantages of proximity focusing low-light-level night vision are small size, light weight, small power consumption, no distortion, fast response speed, wide dynamic range and so on. It is placed parallel to each other for Micro-channel plate (both sides of it with metal electrode), the photocathode and the phosphor screen are placed parallel to each other. The voltage is applied between photocathode and the input of micro-channel plate when image intensifier works. The emission electron excited by photo on the photocathode move towards to micro-channel plate under the electric field in 1st proximity focusing region, and then it is multiplied through the micro-channel. The movement locus of emission electrons can be calculated and simulated when the distributions of electrostatic field equipotential lines are determined in the 1st proximity focusing region. Furthermore the resolution of image tube can be determined. However the distributions of electrostatic fields and equipotential lines are complex due to a lot of micro-channel existing in the micro channel plate. This paper simulates electrostatic distribution of 1st proximity region in double-proximity focusing low-light-level image intensifier with the finite element simulation analysis software Ansoft maxwell 3D. The electrostatic field distributions of 1st proximity region are compared when the micro-channel plates’ pore size, spacing and inclination angle ranged. We believe that the electron beam movement trajectory in 1st proximity region will be better simulated when the electronic electrostatic fields are simulated.

Proceedings Article | 18 September 2014 Paper

A simple device for measuring the spectral transmittance of lens used in InGaAs image intensifier apparatus

Xiaofeng Bai, Hui Guo, Lei Yin, Yingping He, Zhipeng Hou, Zhuang Miao, Lei Yan

Proceedings Volume 9282, 92821O (2014) https://doi.org/10.1117/12.2068569

KEYWORDS: Transmittance, Monochromators, Sensors, Shortwaves, Infrared imaging, Indium gallium arsenide, Objectives, Image intensifiers, Integrating spheres, Light sources

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Proceedings Article | 2 September 2014 Paper

Cooperative chemisorption of K and O elements on cleaved GaAs(110) surface

Bin Ren, Zhuang Miao, Zhi-Peng Hou, Hong-Chang Cheng, Feng Shi, Gang-Cheng Jiao, Xiao-Feng Bai, Sen Niu, Long Wang, Ling-Yun Fu

Proceedings Volume 9284, 92841G (2014) https://doi.org/10.1117/12.2069815

KEYWORDS: Adsorption, Chemical species, Chemical elements, Gallium arsenide, Gallium, Chemisorption, Night vision, Visual process modeling, Optoelectronics, Oxidation

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Proceedings Article | 11 September 2013 Paper

The research of moving object detection with a moving camera

Hai-xin Chen, Guo-hua Gu, Xiao-feng Bai, Tie-kun Zhao, Fu-yuan Xu

Proceedings Volume 8907, 89071Z (2013) https://doi.org/10.1117/12.2032885

KEYWORDS: Cameras, Target detection, 3D modeling, 3D acquisition, Motion models, Detection and tracking algorithms, Reconstruction algorithms, Imaging systems, Optical flow, 3D image reconstruction

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Proceedings Article | 21 August 2013 Paper

Analysis of output signal to noise ratio’s uniformity for low light level image intensifier assembly

Xiaofeng Bai, Lei Yin, Wen Hu, Yingping He, Fangcheng Wang

Proceedings Volume 8908, 89080Q (2013) https://doi.org/10.1117/12.2032712

KEYWORDS: Signal to noise ratio, Image intensifiers, Night vision systems, Interference (communication), Microchannel plates, Imaging systems, Optical sensors, Wafer-level optics, Night vision, Antimony

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Proceedings Article | 16 August 2013 Paper

High illumination resolution test of low-light-level image intensifier

Xiaofeng Bai, Lei Yin, Yufeng Zhu, Yingping He, Zhuang Miao, Wen Hu, Zhipeng Hou, Hongli Shi

Proceedings Volume 8912, 89120L (2013) https://doi.org/10.1117/12.2033671

KEYWORDS: Image intensifiers, Image resolution, Spectral resolution, Light sources, Collimators, Microchannel plates, Objectives, Microscopes, Night vision, Imaging systems

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Proceedings Article | 16 August 2013 Paper

Research on mechanical shock impact of GaAs photocathode photoemission performance

Feng Shi, Hong-chang Cheng, Xiao-feng Bai, Lei Yan, Gang-cheng Jiao

Proceedings Volume 8912, 89120W (2013) https://doi.org/10.1117/12.2034004

KEYWORDS: Gallium arsenide, Quantum efficiency, Image intensifiers, Diffusion, Interfaces, Optoelectronic devices, Absorption, Cesium, Photomultipliers, MATLAB

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Proceedings Article | 16 August 2013 Paper

Measurement conditions study on MCP current gain of the third generation low-light-level image intensifier tube

Lei Yin, Xiao-feng Bai, Liu Feng, Ying-ping He, Xiang Gao

Proceedings Volume 8912, 89120Q (2013) https://doi.org/10.1117/12.2033696

KEYWORDS: Microchannel plates, Image intensifiers, Light sources, Luminous efficiency, Image enhancement, Measurement devices, Ranging, Electrodes, Image processing, Ultraviolet radiation

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Proceedings Article | 16 August 2013 Paper

Effect of ion barrier film on the noise characteristics of proximity focusing low-light-level image intensifier

De Song, Chunyang Liu, Xulei Qin, Shanshan Yu, Kuncheng Fu, Xiaofeng Bai, Xin Wang, Ye Li, Qingduo Duanmu

Proceedings Volume 8912, 89120A (2013) https://doi.org/10.1117/12.2032298

KEYWORDS: Ions, Electrons, Signal to noise ratio, Image intensifiers, Monte Carlo methods, Interference (communication), Microchannel plates, Night vision, Scattering, Image quality

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Proceedings Article | 15 October 2012 Paper

Research on voltage characteristic of the third generation low-light-level image intensifier tube's output signal to noise ratio

Xiaofeng Bai, Lei Yin, Wen Hu, Feng Shi, Zhipeng Hou, Hongli Shi, Yingping He

Proceedings Volume 8419, 84192X (2012) https://doi.org/10.1117/12.975774

KEYWORDS: Signal to noise ratio, Image intensifiers, Microchannel plates, Luminous efficiency, Interference (communication), Night vision, Imaging devices, Photomultipliers, Imaging systems, Optical testing

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Proceedings Article | 15 October 2012 Paper

New half-film method for measuring Al2O3 film MTF of 3rd generation image intensifier

Yaojin Cheng, Feng Shi, Xiaofeng Bai, Yufeng Zhu, Lei Yan, Feng Liu, Min Li

Proceedings Volume 8417, 84170G (2012) https://doi.org/10.1117/12.975927

KEYWORDS: Modulation transfer functions, Image intensifiers, Ions, Microchannel plates, Ion beam finishing, Modulation, Image processing, Aluminum, Scattering, Thin films

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Proceedings Article | 18 August 2011 Paper

Measurement and analysis of signal to noise ratio for image intensifier tube, 18mm microchannel plate

Xiaofeng Bai, Feng Shi, Hanliang Feng, Rong Liu, Lei Yin, Yingping He

Proceedings Volume 8194, 81941W (2011) https://doi.org/10.1117/12.900343

KEYWORDS: Signal to noise ratio, Image intensifiers, Microchannel plates, Signal detection, Imaging systems, Electrons, Night vision, Night vision systems, Interference (communication), Gallium arsenide

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Proceedings Article | 22 October 2010 Paper

Measurement and analysis of modulation transfer function of the third generation low-light-level image intensifier

Junhong Su, Xiaofeng Bai, Feng Shi, Rong Liu, Zhengliang Hu

Proceedings Volume 7658, 765820 (2010) https://doi.org/10.1117/12.866167

KEYWORDS: Modulation transfer functions, Image intensifiers, Optical transfer functions, Imaging systems, Fourier transforms, Light sources, Spatial frequencies, CCD cameras, Light, Integration

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Showing 5 of 30 publications

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