Dr. Zhenqi Niu Profile

Dr. Zhenqi Niu

at Fudan Univ

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 27 November 2023 Poster + Paper

Poster + Paper

Design of processable diffractive optical elements for hyperspectral imaging based on physical model driving

Yitong Pan, Zhenqi Niu, Chaoyang Wei

Proceedings Volume 12768, 127681W (2023) https://doi.org/10.1117/12.2683771

KEYWORDS: Diffractive optical elements, Hyperspectral imaging, Imaging systems, Design and modelling, Systems modeling, Image restoration, Deep learning, Optical surfaces

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Proceedings Article | 10 October 2020 Presentation

Presentation

Challenges in the In-situ Deflectometric Measurement of Optical Surfaces

Xiangchao Zhang, Zhenqi Niu, Junqiang Ye, Shaliang Li, Wanliang Zhao

Proceedings Volume 11552, 115520C (2020) https://doi.org/10.1117/12.2573714

KEYWORDS: Freeform optics, Optics manufacturing, Deflectometry, Fringe analysis, Reflectivity, Imaging systems, Optical imaging, Lenses, Interferometry, Phase retrieval

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Proceedings Article | 20 August 2020 Presentation + Paper

Presentation + Paper

Aberration-induced errors in deflectometric measurement

Xiangchao Zhang, Zhenqi Niu, Junqiang Ye, Shaoliang Li, Wanliang Zhao

Proceedings Volume 11487, 114870K (2020) https://doi.org/10.1117/12.2565588

KEYWORDS: Cameras, Point spread functions, Deflectometry, Imaging systems, Deconvolution

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Proceedings Article | 12 March 2020 Paper

Paper

Fast deflectometric measurement of freeform surfaces for ultra-precision optical manufacturing

Xiangchao Zhang, Xueyang Xu, Zhenqi Niu, Rui Zhu, Min Xu

Proceedings Volume 11439, 114390H (2020) https://doi.org/10.1117/12.2542537

KEYWORDS: Optics manufacturing, Deflectometry, Fringe analysis, Phase shifts, Ray tracing, Optical testing, Freeform optics

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Proceedings Article | 13 November 2019 Paper

Paper

Compensation of nonlinear errors of phase-shifted fringes in phase measuring deflectometry

Zhenqi Niu, Xiangchao Zhang, Xueyang Xu, Yifan Zhu, Shaoliang Li, Siping Peng

Proceedings Volume 11343, 1134303 (2019) https://doi.org/10.1117/12.2541472

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Proceedings Article | 3 September 2019 Paper

Paper

Precise positioning in the in-situ deflectometric measurement of optical surfaces

Xiangchao Zhang, Xueyang Xu, Zhenqi Niu, Shaoliang Li, Siping Peng

Proceedings Volume 11102, 111020S (2019) https://doi.org/10.1117/12.2537330

KEYWORDS: Calibration, Deflectometry, Optical testing, Ray tracing, Manufacturing

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Proceedings Article | 13 May 2019 Paper

Paper

In-situ measurement of aspherics with sub-aperture deflectometry for precision optical manufacturing

Xiangchao Zhang, Xueyang Xu, Zhenqi Niu, Shaoliang Li, Wanliang Zhao

Proceedings Volume 10991, 1099105 (2019) https://doi.org/10.1117/12.2519828

KEYWORDS: Deflectometry, Aspheric lenses, Optics manufacturing, Calibration, Manufacturing, Optical testing

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Proceedings Article | 2 November 2018 Paper

Paper

Precision measurement of specular spherical surfaces based on monoscopic phase measuring deflectometry

Zhenqi Niu, Xiangchao Zhang, Xueyang Xu, Yifan Zhu, Shaoliang Li, Wanliang Zhao

Proceedings Volume 10819, 1081912 (2018) https://doi.org/10.1117/12.2500767

KEYWORDS: Deflectometry, Calibration, Precision measurement, Reconstruction algorithms

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Proceedings Article | 24 November 2016 Paper

Paper

An accurate approach for calibrating rotational angle of camera

Zhenqi Niu, Kuo Liu, Zonghua Zhang

Proceedings Volume 10023, 1002312 (2016) https://doi.org/10.1117/12.2245820

KEYWORDS: Cameras, Calibration, Imaging systems, Distortion, Clouds, Mirrors, Coded apertures, 3D image processing, Information fusion, 3D modeling

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Proceedings Article | 24 November 2016 Paper

Paper

Full-field 3D shape measurement of specular surfaces by direct phase to depth relationship

Zonghua Zhang, Yue Liu, Shujun Huang, Zhenqi Niu, Jiao Guo, Nan Gao, Feng Gao, Xiangqian Jiang

Proceedings Volume 10023, 100230X (2016) https://doi.org/10.1117/12.2246144

KEYWORDS: 3D metrology, Fringe analysis, Calibration, CCD cameras, Mathematical modeling, Mirrors, LCDs, Cameras, Beam splitters, Imaging systems

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Showing 5 of 10 publications

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