Prof. Jian Bai Profile

Prof. Jian Bai

at Zhejiang Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (99)

Proceedings Article | 27 November 2024 Poster + Paper

A fast broadband phase retrieval model based on Zernike coefficient matrix

Yuejia Li, Yuqi Shao, Jian Bai

Proceedings Volume 13237, 1323719 (2024) https://doi.org/10.1117/12.3035885

KEYWORDS: Matrices, Phase retrieval, Wavefronts, Diffraction, Systems modeling, Phase recovery, Fourier transforms, Phase measurement, Telescopes, Numerical simulations

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Proceedings Article | 27 November 2024 Poster + Paper

End-to-end infrared imaging system design with diffractive optical element

Runzhou Shi, Yan Zhou, Tian Zhang, Yuqi Shao, Hanwen Zhang, Ruoyan Wei, Jian Bai

Proceedings Volume 13237, 1323715 (2024) https://doi.org/10.1117/12.3035460

KEYWORDS: Diffractive optical elements, Infrared imaging, Image restoration, Optical design, Neural networks

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Proceedings Article | 27 November 2024 Poster + Paper

Noise model and suppression algorithm for high-precision wavefront detection

Yuqi Shao, Runzhou Shi, Yuejia Li, Huiwen Liu, Tian Zhang, Jian Bai

Proceedings Volume 13237, 132371C (2024) https://doi.org/10.1117/12.3035972

KEYWORDS: Systems modeling, Image processing, Wavefront errors, Wavefront aberrations, Image sensors, Detection and tracking algorithms, Speckle

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Proceedings Article | 27 November 2024 Poster + Paper

High-precision laser centroid extraction algorithm for slight positional variations using four-quadrant detectors

Ning Pan, Kaihang Zhao, Yuejia Li, Huiwen Liu, Jian Bai

Proceedings Volume 13237, 132371M (2024) https://doi.org/10.1117/12.3037139

KEYWORDS: Detection and tracking algorithms, Sensors, Signal detection, Simulations, Photocurrent, Gaussian beams, Position sensors, Photonics, Optical simulations, Nonlinear optics

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Proceedings Article | 27 November 2024 Poster + Paper

Accurate image plane tilt correction using the bidirectional rotational symmetry correction (BRSC) method

Qijie Chen, Diyang Gu, Yiyong Liang, Jian Bai

Proceedings Volume 13237, 132371P (2024) https://doi.org/10.1117/12.3038585

KEYWORDS: Interferograms, Detection and tracking algorithms, Edge detection, Optical alignment, Point diffraction interferometers, Imaging systems, Image segmentation

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Proceedings Article | 27 November 2024 Poster + Paper

Improved Ronchi lateral-shearing interferometry based on sinusoidal amplitude grating

Huiwen Liu, Yicheng Zhu, Runzhou Shi, Jian Bai

Proceedings Volume 13237, 132371F (2024) https://doi.org/10.1117/12.3036012

KEYWORDS: Diffraction gratings, Optical gratings, Diffraction, Phase shifts, Wavefronts, Wavefront errors, Lithography, Interferometry, Wavefront reconstruction

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Proceedings Article | 27 November 2024 Paper

Minimalist optical system image restoration based on deep attention Wiener network

Ziyang Wang, Yan Zhou, Runzhou Shi, Jian Bai

Proceedings Volume 13237, 132370O (2024) https://doi.org/10.1117/12.3035906

KEYWORDS: Image restoration, Point spread functions, Tunable filters, Electronic filtering, Education and training, Deep learning, Image processing, Matrices, Image filtering, Image enhancement

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Proceedings Article | 18 March 2024 Paper

Model optimization of infrared homogenization for inertial confinement fusion cryotargets

Zhaorui Xu, Shaojing Peng, Dong Liu, Jian Bai, Yibin Shen, Lan Wu

Proceedings Volume 13104, 131045R (2024) https://doi.org/10.1117/12.3023695

KEYWORDS: Ray tracing, Infrared radiation, Homogenization, Monte Carlo methods

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Proceedings Article | 28 November 2023 Paper

Wavefront reconstruction for double-grating Ronchi lateral shearing interferometry with nonlinear optimization

Runzhou Shi, Huiwen Liu, Yuqi Shao, Jian Bai

Proceedings Volume 12765, 127650S (2023) https://doi.org/10.1117/12.2688489

KEYWORDS: Phase shifts, Wavefronts, Wavefront reconstruction, Interferograms

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Proceedings Article | 28 November 2023 Poster + Paper

Design of a single-sensor gazing panoramic stereo imaging system with no central blind area

Ning Pan, Shaohua Gao, Jian Bai

Proceedings Volume 12765, 127651V (2023) https://doi.org/10.1117/12.2688600

KEYWORDS: Panoramic photography, Imaging systems, Design and modelling

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Proceedings Article | 28 November 2023 Poster + Paper

Comprehensive stray light analysis and feature rays identification for a panoramic annular lens

Yiqi Liao, Jian Bai

Proceedings Volume 12765, 127651U (2023) https://doi.org/10.1117/12.2688424

KEYWORDS: Stray light, Stray light analysis, Panoramic photography, Optical design, Imaging systems, Design and modelling, Systems modeling, Ray tracing, Optical imaging, Image resolution

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Proceedings Article | 28 November 2023 Poster + Paper

Application of vector phase retrieval model in high numerical aperture optical systems

Yuejia Li, Huiwen Liu, Yingzhe Yang, Jian Bai

Proceedings Volume 12765, 127651W (2023) https://doi.org/10.1117/12.2688663

KEYWORDS: Systems modeling, Diffraction, Reconstruction algorithms, Phase retrieval, Wavefronts, Mathematical optimization, Numerical simulations, Wavefront aberrations, Wavefront sensors, Point spread functions

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Proceedings Article | 28 November 2023 Poster + Paper

Research on lateral-shear interferometry based on double checkerboard grating

Jian Bai, Huiwen Liu, Yuejia Li

Proceedings Volume 12765, 127651Y (2023) https://doi.org/10.1117/12.2688704

KEYWORDS: Shearing interferometers, Optical gratings, Wavefronts, Diffraction gratings, Wavefront aberrations, Ronchi rulings, Phase shifts, Lithography, Lenses, Chromatic aberrations

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Proceedings Article | 21 December 2022 Poster + Paper

Design of detection optical system with large relative aperture

Yingzhe Yang, Yuejia Li, Jia Wang, Jian Bai

Proceedings Volume 12315, 1231515 (2022) https://doi.org/10.1117/12.2642018

KEYWORDS: Optical design, Stray light, Imaging systems, Structural design

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Proceedings Article | 21 December 2022 Poster + Paper

Design of a compact infrared panoramic optical system for unmanned aerial vehicles

Yingzhe Yang, Jia Wang, Yuejia Li, Jian Bai

Proceedings Volume 12315, 1231519 (2022) https://doi.org/10.1117/12.2642220

KEYWORDS: Infrared imaging, Tolerancing, Imaging systems, Panoramic photography, Structural design, Assembly tolerances

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Proceedings Article | 21 December 2022 Presentation + Paper

Phase retrieval wavefront measurement model based on the numerical Fourier theory

Yuejia Li, Yingzhe Yang, Jian Bai, Lei Zhao

Proceedings Volume 12315, 123150I (2022) https://doi.org/10.1117/12.2642004

KEYWORDS: Diffraction, Wavefronts, Charge-coupled devices, Phase retrieval, Francium, Fourier transforms, Phase measurement, Numerical simulations, Fourier theory, Computer simulations

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SPIE Journal Paper | 1 March 2022

High-performance panoramic annular lens design for real-time semantic segmentation on aerial imagery

Jia Wang, Kailun Yang, Shaohua Gao, Lei Sun, Chengxi Zhu, Kaiwei Wang, Jian Bai

OE, Vol. 61, Issue 03, 035101, (March 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.3.035101

KEYWORDS: Image segmentation, Panoramic photography, Imaging systems, Lens design, Tolerancing, Image quality, Optical engineering, Image resolution, Distortion, Optical design

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Proceedings Article | 9 October 2021 Poster + Paper

Design of athermalized wide-angle low-distortion lens using freeform surface

Chengxi Zhu, Jian Bai

Proceedings Volume 11895, 118950U (2021) https://doi.org/10.1117/12.2598657

KEYWORDS: Distortion, Aspheric lenses, Temperature metrology, Zemax, Optical design, Image quality, Imaging systems, Thermal analysis, Refractive index, Glasses

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Proceedings Article | 10 October 2020 Poster + Paper

Optimized phase retrieval method base on multi-focus property of zone plate

Binjie Lu, Lei Zhao, Jian Bai, Jing Hou, Hao Yan

Proceedings Volume 11548, 115481W (2020) https://doi.org/10.1117/12.2575068

KEYWORDS: Phase retrieval, Zone plates, Wavefronts, Reconstruction algorithms, Modulation, Computational imaging, Image restoration, Image encryption, Wavefront sensors, Optical testing

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Proceedings Article | 10 October 2020 Presentation + Paper

Modal-based adaptive autofocusing phase retrieval for wavefront measurement

Lei Zhao, Jian Bai, Jing Hou

Proceedings Volume 11548, 1154805 (2020) https://doi.org/10.1117/12.2575015

KEYWORDS: Wavefronts, Phase retrieval, Distance measurement, Phase measurement, Algorithms, Optimization (mathematics), Diffraction, Interferometers, Freeform optics

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Proceedings Article | 15 June 2020 Paper

Design of SiN waveguide reference wave source for point diffraction interferometer

Yuankai Chen, Yongying Yang, Chen Wang, Yao Li, Zijian Liang, Hongyang Zhao, Shengan Liu, Jian Bai

Proceedings Volume 11523, 115230F (2020) https://doi.org/10.1117/12.2574760

KEYWORDS: Waveguides, Spherical lenses, Transmittance, Single mode fibers, Point diffraction interferometers, Silicon, Silica, Light wave propagation, Photovoltaics, Interferometers

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Proceedings Article | 18 December 2019 Paper

Fast measurement of mid-spatial-frequency error on optical surfaces with convolutional neural networks

Jing Wang, Jian Bai, Xiao Huang, Jing Hou

Proceedings Volume 11342, 1134205 (2019) https://doi.org/10.1117/12.2541988

KEYWORDS: Phase retrieval, Point spread functions, Error analysis, Diffraction, Optical components, Convolutional neural networks, Imaging systems, Reconstruction algorithms

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Proceedings Article | 18 December 2019 Paper

Design of high resolution panoramic annular lens system

Jia Wang, Xiao Huang, Jian Bai, KaiWei Wang, Yongxiao Hua

Proceedings Volume 11338, 113382I (2019) https://doi.org/10.1117/12.2547629

KEYWORDS: Distortion, Imaging systems, Optical design, Panoramic photography, Image sensors, Modulation transfer functions, Image quality, Image resolution, Sensors

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Proceedings Article | 17 October 2019 Presentation + Paper

Visual place recognition based on multilevel descriptors for the visually impaired people

Yicheng Fang, Kaiwei Wang, Ruiqi Cheng, Kailun Yang, Jian Bai

Proceedings Volume 11158, 1115808 (2019) https://doi.org/10.1117/12.2532524

KEYWORDS: Databases, Visualization, Feature extraction, Image processing, Detection and tracking algorithms, Image segmentation, Image enhancement, Sensors, Image sensors, Image transmission

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Proceedings Article | 19 September 2019 Presentation + Paper

Transparent object sensing with enhanced prior from deep convolutional neural network

Jing Wang, Jian Bai, Xiao Huang, Xiangdong Zhou, Lei Zhao, Kun Yan, Jing Hou, Kailun Yang

Proceedings Volume 11169, 111690H (2019) https://doi.org/10.1117/12.2533173

KEYWORDS: Phase retrieval, Convolutional neural networks, Neural networks, Reconstruction algorithms, Evolutionary algorithms, Computational imaging, Sensing systems, Image processing, Imaging systems, 3D surface sensing

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Proceedings Article | 19 September 2019 Paper

Semantic scene understanding on mobile device with illumination invariance for the visually impaired

Chengyou Xu, Kaiwei Wang, Kailun Yang, Ruiqi Cheng, Jian Bai

Proceedings Volume 11169, 111690Q (2019) https://doi.org/10.1117/12.2532550

KEYWORDS: Image segmentation, Mobile devices, Computer programming, Visualization, Convolution, Network architectures

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SPIE Journal Paper | 7 February 2019

Assisting the visually impaired: multitarget warning through millimeter wave radar and RGB-depth sensors

Ningbo Long, Kaiwei Wang, Ruiqi Cheng, Kailun Yang, Weijian Hu, Jian Bai

JEI, Vol. 28, Issue 01, 013028, (February 2019) https://doi.org/10.1117/12.10.1117/1.JEI.28.1.013028

KEYWORDS: Radar, Sensors, Extremely high frequency, Data fusion, Image fusion, Sensor fusion, Filtering (signal processing), Visualization, Radar sensor technology, Detection and tracking algorithms

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Proceedings Article | 30 January 2019 Paper

Description of complex optical surface based on sparse radial basis function approximation with spatially variable shape parameters

Xiangdong Zhou, Jian Bai, Xiao Huang, Lei Zhao, Chen Wang, Yujie Luo

Proceedings Volume 10841, 108410O (2019) https://doi.org/10.1117/12.2506450

KEYWORDS: Optics manufacturing, Zernike polynomials, Error analysis, Signal processing, Design for manufacturability, Optical design, Condition numbers, Optics, Optical engineering, Optical components

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Proceedings Article | 12 December 2018 Paper

Optical design and analysis of a high resolution MOEMS accelerometer based on diffraction grating

Yuan Yao, Debin Pan, Anbing Geng, Haitao Wang, Jian Bai, Qianbo Lu, Peiwen Chen, Weidong Fang

Proceedings Volume 10848, 108480G (2018) https://doi.org/10.1117/12.2505677

KEYWORDS: Diffraction gratings, Microopto electromechanical systems, Optical design, Mirrors, Sensors, Structural sensing, Optical resonators, Interferometry, Mechanical sensors, Modal analysis

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Proceedings Article | 12 December 2018 Paper

Optimization of transverse translation diverse phase retrieval for optical elements with mid-spatial frequency errors

Lei Zhao, Xiao Huang, Jian Bai, Xiangdong Zhou, Yupeng Luo, Juan Du, Yujie Luo

Proceedings Volume 10847, 1084711 (2018) https://doi.org/10.1117/12.2505708

KEYWORDS: Phase retrieval, Optical components, Diffraction, Error analysis, Wavefronts, Optical testing, Phase measurement, Reconstruction algorithms, Spatial frequencies, Laser systems engineering

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Proceedings Article | 5 November 2018 Paper

Comparative analysis of mid-spatial frequency errors measurement using multiple phase retrieval algorithms

Lei Zhao, Xiao Huang, Jian Bai, Xiangdong Zhou, Yupeng Luo, Juan Du, Yujie Luo

Proceedings Volume 10815, 108151M (2018) https://doi.org/10.1117/12.2502680

KEYWORDS: Phase retrieval, Wavefronts, Error analysis, Optical components, Diffraction, Phase measurement, Spatial frequencies, Optical testing, Surface finishing, Zernike polynomials

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Proceedings Article | 5 November 2018 Paper

Thermal stress of MOEMS accelerometers based on grating interferometric cavity

Weidong Fang, Qianbo Lu, Jian Bai, Dandan Han, Peiwen Chen

Proceedings Volume 10815, 108151H (2018) https://doi.org/10.1117/12.2502273

KEYWORDS: Adhesives, Microopto electromechanical systems, Interferometry, Finite element methods, Silicon, Packaging, Thermal effects, Microelectromechanical systems, Thermal modeling, Sensors

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Proceedings Article | 5 November 2018 Paper

Optical design and accuracy analysis of interferometric star tracker

Juan Du, Jian Bai, Li Wang, Jiantao Zhou

Proceedings Volume 10815, 1081504 (2018) https://doi.org/10.1117/12.2501653

KEYWORDS: Stars, Interferometry, Sensors, Optical tracking, Moire patterns, Charge-coupled devices, Optical design, Star sensors, CCD image sensors, Image intensifiers

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Proceedings Article | 26 October 2018 Paper

3D simulation for scatter light distribution of optical surface defects

Huiting Chai, Pengfei Zhang, Yongying Yang, Jian Bai, Yihui Zhang

Proceedings Volume 10742, 1074215 (2018) https://doi.org/10.1117/12.2320439

KEYWORDS: 3D modeling, Light scattering, Imaging systems, Scattering, Calibration, Finite-difference time-domain method, Computer simulations, Image processing, Defect inspection, Defect detection

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Proceedings Article | 10 October 2018 Presentation + Paper

Influence of ocean surface waves and air bubbles on the polarization characteristics of spaceborne oceanographic lidar returns

Qun Liu, Dong Liu, Jian Bai, Yupeng Zhang, Xue Shen

Proceedings Volume 10784, 107840O (2018) https://doi.org/10.1117/12.2325295

KEYWORDS: LIDAR, Scattering, Polarization, Multiple scattering

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Proceedings Article | 9 October 2018 Presentation + Paper

Glass detection and recognition based on the fusion of ultrasonic sensor and RGB-D sensor for the visually impaired

Zhiming Huang, Kaiwei Wang, Kailun Yang, Ruiqi Cheng, Jian Bai

Proceedings Volume 10794, 107940F (2018) https://doi.org/10.1117/12.2325496

KEYWORDS: Glasses, Sensors, Ultrasonics, Mirrors, Sensor fusion, Calibration

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Proceedings Article | 9 October 2018 Presentation + Paper

A pressure-tuned field-widened Michelson interferometer system as the spectroscopic filter of high-spectral-resolution lidar

Xue Shen, Dong Liu, Nanchao Wang, Yibing Shen, Jian Bai, Qun Liu

Proceedings Volume 10791, 107910E (2018) https://doi.org/10.1117/12.2325297

KEYWORDS: Optical filters, Spectroscopy, LIDAR, Michelson interferometers, Interferometers

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Proceedings Article | 5 October 2018 Presentation + Paper

Fusion of millimeter wave radar and RGB-depth sensors for assisted navigation of the visually impaired

Ningbo Long, Kaiwei Wang, Ruiqi Cheng, Kailun Yang, Jian Bai

Proceedings Volume 10800, 1080006 (2018) https://doi.org/10.1117/12.2324626

KEYWORDS: Radar, Sensors, Sensor fusion, Radar sensor technology, Cameras, Data fusion

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Proceedings Article | 14 September 2018 Paper

Polarization point diffraction interferometry based on an even aspheric quarter-wave plate

Yao Li, Yuankai Chen, Yongying Yang, Jian Bai

Proceedings Volume 10742, 107420V (2018) https://doi.org/10.1117/12.2320264

KEYWORDS: Aspheric lenses, Polarization, Calibration, Wave plates, Wavefronts, Wavefront distortions, Diffraction, Point diffraction interferometers, Phase measurement, Surface quality testing

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Proceedings Article | 14 September 2018 Paper

Spherical optical surface defects digitizing evaluation system

Yihui Zhang, Fan Wu, Yongying Yang, Jian Bai, Huiting Chai, Yao Li

Proceedings Volume 10742, 107421A (2018) https://doi.org/10.1117/12.2320473

KEYWORDS: Spherical lenses, Optical components, Imaging systems, Microscopes, Inspection, Image processing, Light scattering, Optical testing

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Proceedings Article | 24 July 2018 Paper

Influence of aberrations and numerical aperture of an illumination microscope objective on the quality of pinhole diffraction wave front

Yuankai Chen, Yongying Yang, Chen Wang, Yao Li, Jian Bai

Proceedings Volume 10827, 108272L (2018) https://doi.org/10.1117/12.2327055

KEYWORDS: Diffraction, Wavefronts, Monochromatic aberrations, Geometrical optics, Near field optics, Transmittance, Microscopes, Objectives, Finite-difference time-domain method

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Proceedings Article | 5 March 2018 Paper

Diffraction analysis of sidelobe characteristics of optical elements with ripple error

Lei Zhao, Yupeng Luo, Jian Bai, Xiangdong Zhou, Juan Du, Qun Liu, Yujie Luo

Proceedings Volume 10710, 1071031 (2018) https://doi.org/10.1117/12.2317564

KEYWORDS: Error analysis, Optical components, Diffraction, Spatial frequencies, Photovoltaics, Optics manufacturing, Surface finishing, Wavefronts, Image quality, Fusion energy

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SPIE Journal Paper | 27 October 2017

Crosswalk navigation for people with visual impairments on a wearable device

Ruiqi Cheng, Kaiwei Wang, Kailun Yang, Ningbo Long, Weijian Hu, Hao Chen, Jian Bai, Dong Liu

JEI, Vol. 26, Issue 05, 053025, (October 2017) https://doi.org/10.1117/12.10.1117/1.JEI.26.5.053025

KEYWORDS: Detection and tracking algorithms, Visualization, Neural networks, Algorithm development, Binary data, Neurons, Roads, Cameras, Evolutionary algorithms, Image segmentation

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Proceedings Article | 24 October 2017 Paper

High-precision attitude angle measuring system based on Talbot interferometry

Juan Du, Jian Bai, Xiao Huang, Yujie Luo, Yupeng Luo

Proceedings Volume 10462, 104623L (2017) https://doi.org/10.1117/12.2285187

KEYWORDS: Interferometry, Optical tracking

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Proceedings Article | 1 August 2017 Paper

Spherical aberration compensation method for long focal-length measurement based on Talbot interferometry

Yupeng Luo, Xiao Huang, Jian Bai, Juan Du, Qun Liu, Yujie Luo, Jia Luo

Proceedings Volume 10339, 103390X (2017) https://doi.org/10.1117/12.2269604

KEYWORDS: Monochromatic aberrations, Interferometry, Optical testing, Laser systems engineering

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SPIE Journal Paper | 20 December 2016

Design of a panoramic long-wave infrared athermal system

Yuan Yao, Anbing Geng, Jian Bai, Haitao Wang, Jie Guo, Tao Xiong, Yujie Luo, Zhi Huang, Xiyun Hou

OE, Vol. 55, Issue 12, 125103, (December 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.12.125103

KEYWORDS: Panoramic photography, Infrared radiation, Infrared imaging, Imaging systems, Modulation transfer functions, Long wavelength infrared, Thermography, Sensors, Infrared sensors, Distortion

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Proceedings Article | 24 November 2016 Paper

Numerical simulation research and applications on scattering imaging of surface defects on optical components

Huiting Chai, Pin Cao, Yongying Yang, Chen Li, Fan Wu, Yihui Zhang, Haoliang Xiong, Lin Zhou, Kai Yan, Wenlin Xu, Dong Liu, Jian Bai, Yibing Shen

Proceedings Volume 10023, 100230L (2016) https://doi.org/10.1117/12.2245430

KEYWORDS: Light scattering, Electromagnetic scattering, Scattering, Finite-difference time-domain method, Imaging systems, Diffraction, Inspection, Calibration, Electromagnetism, Electron beam lithography

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Proceedings Article | 24 November 2016 Paper

Algorithms and applications of aberration correction and American standard-based digital evaluation in surface defects evaluating system

Fan Wu, Pin Cao, Yongying Yang, Chen Li, Huiting Chai, Yihui Zhang, Haoliang Xiong, Wenlin Xu, Kai Yan, Lin Zhou, Dong Liu, Jian Bai, Yibing Shen

Proceedings Volume 10023, 100230T (2016) https://doi.org/10.1117/12.2245891

KEYWORDS: Distortion, Inspection, Defect inspection, Standards development, Imaging systems, Scattering, Optical components, Image processing, Microscopes, Optical inspection

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Proceedings Article | 31 October 2016 Paper

Aspheric and free-form surfaces test with non-null sub-aperture stitching

Dong Liu, Yuhao Zhou, Jian Bai, Tu Shi, Yibing Shen, Yongying Yang, Lei Zhang

Proceedings Volume 10021, 100210N (2016) https://doi.org/10.1117/12.2246149

KEYWORDS: Aspheric lenses, Wavefronts, Reconstruction algorithms, Stitching interferometry, Interferometry, Interferometers, Data modeling, Zernike polynomials, Ray tracing, Spherical lenses

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Proceedings Article | 31 October 2016 Paper

Detection of atmospheric boundary layer height in the plum rain season over Hangzhou area with three-dimensional scanning polarized lidar

Peijun Tang, Dong Liu, Peituo Xu, Yudi Zhou, Jian Bai, Chong Liu, Kaiwei Wang, Yongying Yang, Yibing Shen, Jing Luo, Zhongtao Cheng, Yupeng Zhang, Yanyang Liu

Proceedings Volume 10019, 100190F (2016) https://doi.org/10.1117/12.2245274

KEYWORDS: LIDAR, Atmospheric sensing, Wavelets, 3D scanning, Aerosols, Atmospheric particles, Meteorology, Telescopes, Signal to noise ratio, Control systems

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Proceedings Article | 28 October 2016 Paper

Error analysis of spherical scanning mechanism used for surface defects detection

Haoliang Xiong, Yongying Yang, Chen Li, Huiting Chai, Wenlin Xv, Kai Yan, Lin Zhou, Yang Li, Yihui Zhang, Dong Liu, Jian Bai, Yibing Shen, Pin Cao

Proceedings Volume 9683, 96831U (2016) https://doi.org/10.1117/12.2243267

KEYWORDS: Error analysis, Spherical lenses, Defect detection, Monte Carlo methods, Imaging systems, Ions, Statistical analysis, Optical components, Charge-coupled devices, Matrices

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Proceedings Article | 25 October 2016 Paper

Analysis and amelioration about the cross-sensitivity of a high resolution MOEMS accelerometer based on diffraction grating

Qianbo Lu, Jian Bai, Kaiwei Wang, Shuqi Lou, Xufen Jiao, Dandan Han

Proceedings Volume 9685, 968504 (2016) https://doi.org/10.1117/12.2241339

KEYWORDS: Microopto electromechanical systems, Diffraction gratings, Sensors, Mechanical sensors, Diffraction, Structural sensing, Finite element methods, Silicon, Semiconducting wafers, Etching

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Proceedings Article | 27 September 2016 Paper

Research on auto-centering device in surface defects evaluation system of large spherical optics

Yihui Zhang, Yongying Yang, Fan Wu, Huiting Chai, Kai Yan, Lin Zhou, Yang Li, Dong Liu, Jian Bai, Yibing Shen, Pin Cao

Proceedings Volume 9684, 96841N (2016) https://doi.org/10.1117/12.2243299

KEYWORDS: Spherical lenses, Reticles, Charge-coupled devices, Image processing, Microscopy, Imaging systems, Digital image processing, Optical testing, Image segmentation, Optical scanning systems

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Proceedings Article | 28 August 2016 Presentation + Paper

Mechanical design optimization of a single-axis MOEMS accelerometer based on a grating interferometry cavity for ultrahigh sensitivity

Qianbo Lu, Jian Bai, Kaiwei Wang, Shuqi Lou, Xufen Jiao, Dandan Han, Guoguang Yang

Proceedings Volume 9960, 99600W (2016) https://doi.org/10.1117/12.2235409

KEYWORDS: Microopto electromechanical systems, Interferometry, Mechanical engineering, Mechanical sensors, Optical design, Finite element methods, Mechanical engineering, Mirrors, Silicon, 3D modeling, Lanthanum

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Proceedings Article | 28 August 2016 Presentation + Paper

The analysis of temperature effect and temperature compensation of MOEMS accelerometer based on a grating interferometric cavity

Dandan Han, Jian Bai, Qianbo Lu, Shuqi Lou, Xufen Jiao, Guoguang Yang

Proceedings Volume 9960, 99600X (2016) https://doi.org/10.1117/12.2236584

KEYWORDS: Interferometry, Finite element methods, Performance modeling, Microopto electromechanical systems, Quantitative analysis, Modulation, Mechanical sensors, Temperature metrology, Microelectromechanical systems, Diffraction gratings

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Proceedings Article | 29 July 2016 Paper

A novel design of dual-channel optical system of star-tracker based on non-blind area PAL system

Yujie Luo, Jian Bai

Proceedings Volume 9904, 99046H (2016) https://doi.org/10.1117/12.2232205

KEYWORDS: Stars, Imaging systems, Satellites, Optical design, Imaging systems, Stars, Optical design, Panoramic photography, Sensors, Optical filters, Multichannel imaging systems, Relays, Image filtering

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Proceedings Article | 13 May 2016 Paper

Field-widened Michelson interferometer system as the spectroscopic filter of high-spectral-resolution lidar

Zhongtao Cheng, Dong Liu, Yudi Zhou, Yongying Yang, Yupeng Zhang, Jing Luo, Jian Bai, Chong Liu, Yibing Shen

Proceedings Volume 9832, 98320Y (2016) https://doi.org/10.1117/12.2223715

KEYWORDS: Optical filters, Interferometers, Spectroscopy, Glasses, Wavefront distortions, Michelson interferometers, LIDAR, Wavefronts, Solids, Aerosols

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Proceedings Article | 13 May 2016 Paper

Polarized high-spectral-resolution lidar based on field-widened Michelson interferometer

Dong Liu, Zhongtao Cheng, Jing Luo, Yongying Yang, Yupeng Zhang, Yudi Zhou, Jian Bai, Chong Liu, Yibing Shen

Proceedings Volume 9832, 98320Z (2016) https://doi.org/10.1117/12.2223735

KEYWORDS: LIDAR, Michelson interferometers, Optical filters, Aerosols, Atmospheric particles, Backscatter, Calibration, Scattering, Laser scattering, Beam splitters

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Proceedings Article | 13 May 2016 Paper

Comprehensive view of high-spectral-resolution lidar technique from the perspective of spectral discrimination

Zhongtao Cheng, Dong Liu, Yongying Yang, Jing Luo, Yupeng Zhang, Yudi Zhou, Jian Bai, Chong Liu, Yibing Shen

Proceedings Volume 9832, 983213 (2016) https://doi.org/10.1117/12.2223750

KEYWORDS: Optical filters, LIDAR, Atmospheric modeling, Transmittance, Aerosols, Monte Carlo methods, Signal to noise ratio, Electronic filtering, Backscatter, Atmospheric particles

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Proceedings Article | 13 May 2016 Paper

High-spectral-resolution lidar for ocean ecosystem studies

Dong Liu, Yudi Zhou, Yongying Yang, Zhongtao Cheng, Jing Luo, Yupeng Zhang, Yibing Shen, Kaiwei Wang, Chong Liu, Jian Bai

Proceedings Volume 9832, 983214 (2016) https://doi.org/10.1117/12.2224488

KEYWORDS: LIDAR, Remote sensing, Scattering, Laser scattering, Ecosystems, Ocean optics, Mie scattering, Water, Molecules, Backscatter

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Proceedings Article | 15 October 2015 Paper

Analysis of the imaging performance of panoramic annular lens with conic conformal dome

Xiao Huang, Jian Bai

Proceedings Volume 9676, 96760G (2015) https://doi.org/10.1117/12.2199067

KEYWORDS: Modulation transfer functions, Panoramic photography, Domes, Glasses, Imaging systems, Aerospace engineering, Aerodynamics, Silica, Head, Image sensors

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Proceedings Article | 12 October 2015 Paper

Adaptive position detection of optical vortex using a Shack-Hartmann wavefront sensor

Jia Luo, Hongxin Huang, Yoshinori Matsui, Haruyoshi Toyoda, Takashi Inoue, Jian Bai

Proceedings Volume 9633, 96332A (2015) https://doi.org/10.1117/12.2195693

KEYWORDS: Spiral phase plates, Wavefront sensors, Optical vortices, Beam splitters, Collimation, Spatial light modulators, Spatial resolution, Photonics, Information operations, Phase shift keying

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Proceedings Article | 12 October 2015 Paper

Reverse optimization reconstruction method in non-null aspheric interferometry

Lei Zhang, Dong Liu, Tu Shi, Yongying Yang, Shiyao Chong, Yibing Shen, Jian Bai

Proceedings Volume 9633, 96332D (2015) https://doi.org/10.1117/12.2195844

KEYWORDS: Aspheric lenses, Wavefronts, Optimization (mathematics), Systems modeling, Data modeling, Ray tracing, Interferometry, Photovoltaics, Sensors, Objectives

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Proceedings Article | 11 October 2015 Paper

Non-null annular subaperture stitching interferometry for aspheric test

Lei Zhang, Dong Liu, Tu Shi, Yongying Yang, Shiyao Chong, Liang Miao, Wei Huang, Yibing Shen, Jian Bai

Proceedings Volume 9633, 96331Q (2015) https://doi.org/10.1117/12.2195818

KEYWORDS: Optical spheres, Aspheric lenses, Wavefronts, Ray tracing, Interferometers, Systems modeling, Stitching interferometry, Reconstruction algorithms, Mathematical modeling, Mathematics

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Proceedings Article | 11 October 2015 Paper

Model-based phase-shifting interferometer

Dong Liu, Lei Zhang, Tu Shi, Yongying Yang, Shiyao Chong, Liang Miao, Wei Huang, Yibing Shen, Jian Bai

Proceedings Volume 9633, 96331R (2015) https://doi.org/10.1117/12.2195845

KEYWORDS: Interferometers, Wavefronts, Mirrors, Spherical lenses, Systems modeling, Beam splitters, Ray tracing, Phase shifts, Model-based design, Aspheric lenses

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Proceedings Article | 8 October 2015 Paper

Improved restoration algorithm for weakly blurred and strongly noisy image

Qianshun Liu, Guo Xia, Haiyang Zhou, Jian Bai, Feihong Yu

Proceedings Volume 9675, 96750J (2015) https://doi.org/10.1117/12.2197673

KEYWORDS: Image restoration, Digital imaging, Image processing, Denoising, Computer simulations, Cameras, Databases, Image compression, Image analysis, Image filtering

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Proceedings Article | 8 October 2015 Paper

Detection of micro-sized air bubble defects in optical glass based on Mie theory

Sai Zhang, Jian Bai, Kaiwei Wang, Fan He, Bin Zhou

Proceedings Volume 9677, 96770R (2015) https://doi.org/10.1117/12.2199047

KEYWORDS: Mie scattering, Light scattering, Scattering, Glasses, Laser scattering, Particles, Optical testing, CCD cameras, Defect detection, Gaussian beams

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SPIE Journal Paper | 21 September 2015 Open Access

Pattern recognition model for aerosol classification with atmospheric backscatter lidars: principles and simulations

Dong Liu, Yongying Yang, Yupeng Zhang, Zhongtao Cheng, Zhifei Wang, Jing Luo, Lin Su, Liming Yang, Yibing Shen, Jian Bai, Kaiwei Wang

JARS, Vol. 9, Issue 01, 096006, (September 2015) https://doi.org/10.1117/12.10.1117/1.JRS.9.096006

KEYWORDS: Aerosols, LIDAR, Atmospheric modeling, Atmospheric particles, Backscatter, Pattern recognition, Databases, Image classification, Atmospheric sensing, Data modeling

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Proceedings Article | 20 August 2015 Presentation + Paper

Tolerance analysis of the pulse signal of a novel lateral deformable optical NEMS grating transducer

Chen Wang, Jian Bai, Kaiwei Wang

Proceedings Volume 9556, 95560G (2015) https://doi.org/10.1117/12.2186555

KEYWORDS: Tolerancing, Signal attenuation, Diffraction gratings, Transducers, Finite-difference time-domain method, Reflectivity, Nanoelectromechanical systems, Sensors, Microelectromechanical systems

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Proceedings Article | 7 August 2015 Paper

Recent developments of interferometric wavefront sensing

Dong Liu, Yongying Yang, Xiaoyu Chen, Tong Ling, Lei Zhang, Jian Bai, Yibing Shen

Proceedings Volume 9623, 962303 (2015) https://doi.org/10.1117/12.2191222

KEYWORDS: Wavefronts, Interferometers, Interferometry, Diffraction, Wavefront sensors, Gemini Planet Imager, Spherical lenses, Phase shifts, Aspheric lenses, Shearing interferometers

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Proceedings Article | 5 November 2014 Paper

Design of vari-focal panoramic annular lenses based on Alvarez surfaces

Yujie Luo, Jian Bai, Yuan Yao

Proceedings Volume 9272, 927216 (2014) https://doi.org/10.1117/12.2071224

KEYWORDS: Imaging systems, Panoramic photography, Lenses, Relays, Optical components, Optical design, Spherical lenses, Geometrical optics, Sensors, Sensing systems

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Proceedings Article | 5 November 2014 Paper

Distortion control for panoramic annular lens with Q-type aspheres

Xiangdong Zhou, Jian Bai

Proceedings Volume 9272, 92721D (2014) https://doi.org/10.1117/12.2071692

KEYWORDS: Distortion, Aspheric lenses, Zemax, Panoramic photography, Optical design, Diffraction, Image quality, Modulation transfer functions, Glasses, Image resolution

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Proceedings Article | 18 September 2014 Paper

Calibration for the errors resulted from aberration in long focal length measurement

Jiang Yao, Jia Luo, Fan He, Jian Bai, Kaiwei Wang, Xiyun Hou, Changlun Hou

Proceedings Volume 9282, 92821S (2014) https://doi.org/10.1117/12.2069978

KEYWORDS: Calibration, Error analysis, Interferometry, Zemax, Visualization, Numerical analysis, C++, Holograms, Confocal microscopy, Optical testing

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Proceedings Article | 18 September 2014 Paper

Calibration method for angular measurement of moiré patterns

Fan He, Jian Bai, Kaiwei Wang, Xiyun Hou, Jiang Yao

Proceedings Volume 9282, 92821B (2014) https://doi.org/10.1117/12.2070535

KEYWORDS: Calibration, Statistical analysis, Collimation, Helium neon lasers, CCD cameras, Ronchi rulings, Astatine, Signal analyzers, Spatial frequencies, Interferometry

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Proceedings Article | 21 August 2014 Paper

Analysis and optimization of a novel laterally deformable optical NEMS grating transducer

Chen Wang, Jian Bai, Guo-Guang Yang

Proceedings Volume 9283, 928303 (2014) https://doi.org/10.1117/12.2067787

KEYWORDS: Reflectivity, Finite-difference time-domain method, Optical design, Transducers, Nanoelectromechanical systems, Signal attenuation, Microelectromechanical systems, Optimization (mathematics), Silicon, Sensors

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Proceedings Article | 17 July 2014 Open Access

The high education of optical engineering in East China

Xu Liu, Xiangdong Liu, Xiaoping Wang, Jian Bai, Yuling Liu

Proceedings Volume 9289, 92890T (2014) https://doi.org/10.1117/12.2070286

KEYWORDS: Optical engineering, Photonics, Telecommunications, Computer aided design, Imaging systems, Optical instrument design, Optical communications, Computing systems, Mechanics, Integrated optics

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Proceedings Article | 15 October 2012 Paper

Determination of long focal length of lenses with Talbot interferometer

Xiaorong Jin, Honglei Yu, Jian Bai, Xiyun Hou

Proceedings Volume 8417, 84171V (2012) https://doi.org/10.1117/12.965242

KEYWORDS: Collimation, Calibration, Error analysis, Interferometers, Lenses, Near field optics, Optical testing, Diffraction gratings, Mirrors, Environmental sensing

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Proceedings Article | 15 October 2012 Paper

Design of a panoramic annular lens with a horizontal symmetric FOV

Yuan Yao, Huang Zhi, Jian Bai, Xi Yun Hou

Proceedings Volume 8417, 841703 (2012) https://doi.org/10.1117/12.974921

KEYWORDS: Distortion, Aspheric lenses, Panoramic photography, Relays, Modulation transfer functions, Imaging systems, Charge-coupled devices, Lens design, Refractive index, Refraction

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Proceedings Article | 15 October 2012 Paper

Analyze and research the Moire fringe with information entropy theory

Honglei Yu, Xiaorong Jin, Jian Bai, Hao Hu

Proceedings Volume 8417, 84170O (2012) https://doi.org/10.1117/12.965545

KEYWORDS: Moire patterns, Analytical research, Fringe analysis, Information theory, Mathematics, Image information entropy, Image processing, Optical testing, Statistical analysis, Spatial frequencies

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SPIE Journal Paper | 1 November 2011

Optical tilt sensor with direct intensity-modulated scheme

Shuangshuang Zhao, Juan Zhang, Changlun Hou, Jian Bai, Guoguang Yang

OE, Vol. 50, Issue 11, 114405, (November 2011) https://doi.org/10.1117/12.10.1117/1.3655566

KEYWORDS: Sensors, Diffraction gratings, Mechanical sensors, Fiber Bragg gratings, Optical signal processing, Optical circuits, Silicon, Interference (communication), Light sources, Electromagnetic interference

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Proceedings Article | 17 November 2010 Paper

A new method of calculating the diffraction efficiency for diffraction/refraction infrared hybrid system

Tao Wang, Jian Bai, Yiyong Liang, Xiyun Hou

Proceedings Volume 7848, 78482G (2010) https://doi.org/10.1117/12.870137

KEYWORDS: Diffraction, Infrared imaging, Infrared radiation, Sensors, Refraction, Optical components, Bandpass filters, Optical amplifiers, Environmental sensing, Lens design

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