Prof. Liqun Chai Profile

Prof. Liqun Chai

at Chengdu Fine Optical Engineering Research Ctr

SPIE Involvement:

Author

Publications (23)

SPIE Journal Paper | 22 May 2024

Measurement of out-of-plane first-order displacement derivatives in orthogonal shear directions using dichroic mirrors

Yinhui Guo, Xinda Zhou, Jie Li, Rongsheng Ba, Yinbo Zheng, Liqun Chai

OE, Vol. 63, Issue 05, 054111, (May 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.5.054111

KEYWORDS: Dichroic mirrors, Shearography, Reflection, Color, Beam splitters, Quantum channels, Photovoltaics, Emission wavelengths, Cameras, Optical engineering

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Proceedings Article | 13 December 2021 Paper

A new optical polarizing prism extinction ratio measurement method based on heterodyne-detecting

Zhendong Shi, Hua Ma, Lin Zhang, Jinxi Bai, Yi Yang, Huan Ren, Liqun Chai

Proceedings Volume 12071, 120710Q (2021) https://doi.org/10.1117/12.2604853

KEYWORDS: Polarization, Prisms, Polarizing prisms, Optical amplifiers, Environmental sensing

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Proceedings Article | 13 December 2021 Paper

Fizeau interferometry with computer generated hologram for mid-spatial wavefront measurement of lens with long focal length

Xiaohong Wei, Kaiyuan Xu, Ang Liu, Qiang Li, Liqun Chai

Proceedings Volume 12071, 120710N (2021) https://doi.org/10.1117/12.2604838

KEYWORDS: Wavefronts, Computer generated holography, Error analysis, Interferometry, Holograms, Turbulence, Reflectivity, Optics manufacturing, Wavefront aberrations, Spatial frequencies

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SPIE Journal Paper | 30 December 2020

Accurate determination of random pattern phase in structured illumination microscopy with low modulation depth

Xinying Cui, Ning Chen, Jinxi Bai, Zhendong Shi, Hua Ma, Yi Yang, Ke Ma, Huan Ren, Liqun Chai, Lei Chen, Lin Zhang

OE, Vol. 59, Issue 12, 123105, (December 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.12.123105

KEYWORDS: Reconstruction algorithms, Modulation, Phase shift keying, Error analysis, Super resolution, Phase shifts, Image processing, Microscopy, Optical engineering, Computer simulations

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Proceedings Article | 20 December 2019 Paper

Automatic test system for multiwavelength laser-induced damage threshold measurements

Jie Li, Rongsheng Ba, Xinda Zhou, Yinbo Zheng, Lei Ding, Liqun Chai, Huan Ren, Xiaodong Tang

Proceedings Volume 11209, 112091S (2019) https://doi.org/10.1117/12.2547608

KEYWORDS: Laser induced damage, Laser damage threshold

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Proceedings Article | 24 January 2019 Paper

Fresnel zone plate method for measuring lens transmission wavefront power spectral density

Xiaohong Wei, Yuhang He, Qiang Li, Bo Gao, Kaiyuan Xu, Liqun Chai

Proceedings Volume 10840, 108400Y (2019) https://doi.org/10.1117/12.2506622

KEYWORDS: Wavefronts, Computer generated holography, Holograms, Diffraction, Diffraction gratings, Interferometry, Distortion, Reflectivity, Optical design, Error analysis

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Proceedings Article | 18 January 2019 Paper

Multi-wavelength investigation of the influence of polarization orientation on bulk damage resistance of type I doubler KDP crystals

Yin-Bo Zheng, Rong-Sheng Ba, Xin-Da Zhou, Jie Li, Lei Ding , Jing Yuan , Hong-Lei Xu , Jin Na , Ya-Jun Li, Huan Ren , Xiao-dong Tang , Li-qun Chai

Proceedings Volume 10839, 108391D (2019) https://doi.org/10.1117/12.2506536

KEYWORDS: Polarization, Crystals, Laser induced damage

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Proceedings Article | 18 January 2019 Paper

Optimal modified lateral shearing interferometer for in-line damage morphology measurement

Jie Li, Rongsheng Ba, Xinda Zhou, Yinbo Zheng, Lei Ding, Jing Yuan, Liqun Chai

Proceedings Volume 10839, 108390G (2019) https://doi.org/10.1117/12.2504885

KEYWORDS: Shearing interferometers, Laser induced damage, Optical coatings

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Proceedings Article | 31 August 2018 Paper

An error correction model based on neural network for laser displacement sensor

Lili Guan, Liqun Chai, Qiang Li, Yuhang He, Daoming Wan

Proceedings Volume 10835, 108350F (2018) https://doi.org/10.1117/12.2503948

KEYWORDS: Sensors, Error analysis, Laser scattering, Laser applications, Neural networks, Distance measurement, Data modeling

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Proceedings Article | 24 October 2017 Paper

Preliminary study of the influence of polarization orientation on bulk damage resistances of doubler KDP crystals

YinBo Zheng, RongSheng Ba, XinDa Zhou, Jie Li, Jing Yuan, HongLei Xu, Jin Na, YaJun Li, Lei Ding, XiaoYu Yang, Liqun Chai, Bo Chen, WanGuo Zheng

Proceedings Volume 10457, 104571E (2017) https://doi.org/10.1117/12.2284252

KEYWORDS: Crystals, Polarization, Crystallography

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SPIE Journal Paper | 22 February 2017

Method for improving measurement efficiency of lateral shearing interferometry

Jie Li, Feng Tang, Xiangzhao Wang, Fengzhao Dai, Lei Ding, Bo Chen, Xiaoyu Yang, Liqun Chai

OE, Vol. 56, Issue 02, 024107, (February 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.2.024107

KEYWORDS: Wavefronts, Error analysis, Zernike polynomials, Interferometry, Wavefront reconstruction, Optical engineering, Computer simulations, Statistical analysis, Optical testing, Sensors

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Proceedings Article | 27 September 2016 Paper

New reconstruction algorithm for absolute shape calibration in two-flat test

Yuhang He, Qiang Li, Daoming Wan, Liqun Chai

Proceedings Volume 9684, 96842N (2016) https://doi.org/10.1117/12.2242722

KEYWORDS: Reconstruction algorithms, Calibration, Zernike polynomials, Barium, Computer simulations, Error analysis, Chemical elements, Interferometry, Interferometers, Fourier transforms

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Proceedings Article | 27 September 2016 Paper

Computer-generated holograms for precision optical testing

Xiaohong Wei, Yuhang He, Kaiyuan Xu, Bo Gao, Qiang Li, Liqun Chai

Proceedings Volume 9684, 96842C (2016) https://doi.org/10.1117/12.2243164

KEYWORDS: Computer generated holography, Wavefronts, Holograms, Optical fabrication, Optical testing, Diffraction, Aspheric lenses, Diffraction gratings, Interferometry, Holographic interferometry

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Proceedings Article | 19 February 2015 Paper

Automatic stitching interferometry for large plano optics

Ang Liu, Bo Gao, Kaiyuan Xu, Yuhang He, Qiang Li, Liqun Chai

Proceedings Volume 9449, 94492T (2015) https://doi.org/10.1117/12.2075830

KEYWORDS: Stitching interferometry, Plano, Data fusion, Interferometers, Optical engineering, Data corrections, Interferometry, Detection and tracking algorithms, Process modeling, Lithium

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Proceedings Article | 3 December 2014 Paper

Absolute measurement of square flats with Legendre polynomial fitting method

Bo Gao, Qiang Li, Yuhang He, Liqun Chai, Xiaohong Wei

Proceedings Volume 9297, 92970E (2014) https://doi.org/10.1117/12.2069823

KEYWORDS: Zernike polynomials, Lithium, Optical engineering, Roads, Spatial frequencies, National Ignition Facility, Interferometers, Optoelectronics, Technologies and applications, Fiber lasers

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Proceedings Article | 3 December 2014 Paper

Lens wavefront measurement technique with a reflective Fresnel-zone hologram

Xiaohong Wei, Bo Gao, Kaiyuan Xu, Qiang Li, Yuhang He, Ang Liu, Liqun Chai

Proceedings Volume 9297, 929705 (2014) https://doi.org/10.1117/12.2069421

KEYWORDS: Holograms, Wavefronts, Spherical lenses, Reflectivity, Diffraction, Mirrors, Interferometry, Holographic interferometry, Manufacturing, Interferometers

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SPIE Journal Paper | 11 June 2014 Open Access

Errata: Improved iterative algorithm for the three-flat test

Bo Gao, Qiang Li, Yuhang He, Liqun Chai

OE, Vol. 53, Issue 09, 099801, (June 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.9.099801

KEYWORDS: Lithium, Optical engineering, Roads

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SPIE Journal Paper | 16 April 2014 Open Access

Improved iterative algorithm for the three-flat test

Bo Gao, Qiang Li, Yuhang He, Liqun Chai

OE, Vol. 53, Issue 09, 092004, (April 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.9.092004

KEYWORDS: Error analysis, Data processing, Optical engineering, Computer simulations, Reconstruction algorithms, Zernike polynomials, Lithium, Wavefronts, Roads, Numerical simulations

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Proceedings Article | 15 October 2012 Paper

Study on stress birefringence measurement of uni-axial crystal

Xiaohong Wei, Liqun Chai, Qiang Li, Bo Gao

Proceedings Volume 8417, 84172R (2012) https://doi.org/10.1117/12.2002560

KEYWORDS: Crystals, Birefringence, Crystallography, Refractive index, Laser crystals, Polarization, Electro optics, Jones vectors, Statistical analysis, Light sources

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Proceedings Article | 17 January 2008 Paper

Interferometric measurements of mid-spatial scale surface irregularities

Jiancheng Xu, Qiao Xu, Liqun Chai, Yan Deng

Proceedings Volume 6723, 67233M (2008) https://doi.org/10.1117/12.783513

KEYWORDS: Spatial frequencies, Charge-coupled devices, Interferometry, Signal to noise ratio, Interferometers, Silica, Interference (communication), Error analysis, Optical testing, Fourier transforms

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Proceedings Article | 19 May 2006 Paper

500-mm aperture wavelength-tuning phase-shifting interferometer

Liqun Chai, Qiao Xu, Yan Deng, Guiping Cheng, Jiancheng Xu, Qikai Shi

Proceedings Volume 6150, 61500E (2006) https://doi.org/10.1117/12.677976

KEYWORDS: Phase shifts, Interferometers, Photovoltaics, Optical testing, Calibration, Image quality, Optical components, Optical design, Wavefronts, Tunable lasers

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Proceedings Article | 19 May 2006 Paper

Design of a coherent optical interferometric system

Jiancheng Xu, Guiping Sheng, Liqun Chai, Qiao Xu, Yan Deng

Proceedings Volume 6150, 61501B (2006) https://doi.org/10.1117/12.676409

KEYWORDS: Wavefronts, Imaging systems, Interferometers, Spatial frequencies, Tolerancing, Charge-coupled devices, Optics manufacturing, Collimators, Reflectivity, Error analysis

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Proceedings Article | 13 June 2005 Paper

500-mm-aperture wavelength-tuning phase-shifting interferometer

Liqun Chai, Qiao Xu, Yingjie Yu, Yang Deng, Jiancheng Xu

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.611796

KEYWORDS: Phase shifts, Interferometers, Photovoltaics, Calibration, Reflectivity, Image quality, Optical testing, Tunable lasers, Diodes, Optical components

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Showing 5 of 23 publications

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