Mr. Zhenjun Bao Profile

Zhenjun Bao

at Chengdu Fine Optical Engineering Research Ctr

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Author

Publications (15)

Proceedings Article | 29 December 2023 Paper

Focal length measurement of large aperture lenses using CGH

Jian-Peng Cui, Zhi-Gang Li, Heng Zhao, Ning Zhang, Zhen-Jun Bao, Di-Long Wu, Hua Xu

Proceedings Volume 12976, 129761T (2023) https://doi.org/10.1117/12.3009495

KEYWORDS: Computer generated holography, Lenses, Error analysis, Distance measurement, Wavefronts, Fizeau interferometers, Spatial filtering, Interferometers, Diffraction, Confocal microscopy

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Proceedings Article | 29 December 2023 Paper

Research on stable convergence technology of transmitted wavefront mid-spatial-frequency errors of large square spherical lens

Zhigang Li, Jinyong Huang, Jianpeng Cui, Zhenjun Bao, Heng Zhu, Dilong Wu, Hongmei Cai

Proceedings Volume 12976, 129761N (2023) https://doi.org/10.1117/12.3009460

KEYWORDS: Polishing, Wavefront errors, Spherical lenses, Wavefronts, Spatial frequencies, Optics manufacturing, Spatial filtering

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The transmitted wavefront mid-spatial-frequency(MSF) errors of spherical lens has a great influence on the quality of the transmitted beam. Aiming at the problems of poor convergence precision and low convergence efficiency in mid-spatial frequency errors polishing of large square spherical lenses, this paper proposes a mid-spatial-frequency errors correction technology by using full-aperture rigid polishing combined with numerically controlled sub-aperture smooth polishing. In the full-aperture polishing stage, the surface shape distribution that is conducive to subsequent sub-aperture polishing is obtained through radius compensation technology to reduce the sudden change of surface shape in the corner area of the component. The more rigid polishing pad is used to smooth the whole surface then, so that the component has better MSF errors condition before the sub-aperture high-precision surface correction. In the stage of small tool CNC polishing, the transmission structure and mass distribution of the polishing disc are optimized, and the ideal transmission characteristics and size parameters of the polishing disc are obtained through mechanical simulation analysis to reduce the overturning moment of the polishing disc when the direction changes suddenly. This optimization also improves the pressure distribution of the polishing interface. Stability, a flexible polishing disc combined with a high dispersion polishing slurry is used to correct the surface errors. The concentration of the polishing slurry is optimized and the supply method is well changed. So when the surface shape errors convergence process is more efficient and controllable, it will not cause the deterioration of the MSF errors. The smooth tool is applied in the last stage with reducing the temperature change of the polishing interface. All these measures are aimed to increase the stability of smooth polishing and to achieve high-efficiency, high-precision and stable convergence of MSF errors. The experimental verification was carried out on four square spherical lenses with a size of 440mm×440mm. The final PSD1:RMS values have all reached within 1.8nm. Additionally the overall processing time has been greatly shortened.

Proceedings Article | 27 November 2023 Paper

Mid-spatial frequency error measurement of large aperture lenses

Jian-Peng Cui, Zhi-Gang Li, Heng Zhao, Ning Zhang, Zhen-Jun Bao, Di-Long Wu, Hua Xu

Proceedings Volume 12769, 127690L (2023) https://doi.org/10.1117/12.2687466

KEYWORDS: Lenses, Wavefront errors, Laser frequency, Computer generated holography, Wavefronts, Laser systems engineering, Error analysis, Diffraction, Wave propagation, Spectral models

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Proceedings Article | 27 October 2021 Paper

Radius measurement of large aperture long-focal-length lens using computer-generated hologram

Jian-Peng Cui, Zhi-Gang Li, Zhen-Jun Bao, Heng Zhao, Ning Zhang, Jie Liu, Di-Long Wu, Hua Xu, Ping Ma

Proceedings Volume 11927, 119270E (2021) https://doi.org/10.1117/12.2616261

KEYWORDS: Computer generated holography, Interferometers, Wavefronts, Optical spheres, Confocal microscopy, Distance measurement, Optical alignment, Error analysis, Spherical lenses, Spatial filters

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Proceedings Article | 4 December 2020 Paper

Ultra-long curvature radius control technology of spherical optical element during full aperture polishing

Di-long Wu, Heng Zhu, Heng Zhao, Jian-peng Cui, Zhen-jun Bao, Zhi-gang Li, Hong-mei Cai, Ding-yao Yan, Ping Ma

Proceedings Volume 11617, 116171H (2020) https://doi.org/10.1117/12.2585158

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Proceedings Article | 4 December 2020 Paper

The control technical research of the subsecond accuracy parallelism in polishing sapphire window

Heng Zhu, Zhen-jun Bao, Di-long Wu, Ping Ma

Proceedings Volume 11617, 1161735 (2020) https://doi.org/10.1117/12.2585427

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Proceedings Article | 4 December 2020 Paper

The convergence of mid-spatial-frequency error of transmitted wavefront of large-aperture spherical lens by numerical control polishing

Zhi-Gang Li, Zhen-Jun Bao, Jian-Peng Cui, Heng Zhu, Jin-Yong Huang

Proceedings Volume 11617, 116172J (2020) https://doi.org/10.1117/12.2585346

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Proceedings Article | 5 November 2020 Paper

Transformation of projection distortion for off-axis parabolic mirror in aberration-free point test

Zhenjun Bao, Heng Zhu, Zhigang Li, Dingyao Yan

Proceedings Volume 11568, 1156802 (2020) https://doi.org/10.1117/12.2573068

KEYWORDS: Mirrors, Off axis mirrors, Distortion, Interferometers, Surface finishing, Polishing

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Proceedings Article | 31 January 2020 Paper

Stability study of removal function for aspheric surface based on non-Newtonian fluid polishing tool

Zhenjun Bao, Heng Zhu, Zhigang Li, Dingyao Yan

Proceedings Volume 11427, 1142708 (2020) https://doi.org/10.1117/12.2548883

KEYWORDS: Polishing, Surface finishing, Aspheric lenses, Polyurethane, Shape analysis, Liquids, Spherical lenses, Chemical elements

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Proceedings Article | 31 January 2020 Paper

Research on the technology of correcting the transmitted wavefront GRMS of large-diameter spatial filter lens by CCOS

Zhigang Li, Zhenjun Bao, Heng Zhu, Jianpeng Cui, Dilong Wu, Ping Ma

Proceedings Volume 11427, 1142743 (2020) https://doi.org/10.1117/12.2553181

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Proceedings Article | 10 May 2019 Paper

The mid and low-spatial frequency error control technology research during the process with ion-beam figuring in large aperture standard mirror

Heng Zhu, Zhi-gang Li, Zhen-jun Bao, Hong-mei Cai, Ding-yao Yan, Ping Ma

Proceedings Volume 11068, 110681T (2019) https://doi.org/10.1117/12.2524634

KEYWORDS: Ion beams, Mirrors, Polishing, Surface finishing, Silica, Error control coding, Standards development, Photovoltaics, Wavefronts, Optical components

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Proceedings Article | 10 May 2019 Paper

Technical research on fabricating steep off-axis aspherical mirror based on infrared interferometric testing

Heng Zhu, Zhenjun Bao, Jie Liu, Zhigang Li, Dingyao Yan, Ping Ma

Proceedings Volume 11068, 1106825 (2019) https://doi.org/10.1117/12.2524686

KEYWORDS: Polishing, Off axis mirrors, Interferometry, Mirrors, Infrared radiation, Surface finishing, Infrared technology, Interferometers, Optical fabrication

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Proceedings Article | 16 January 2019 Paper

Research on processing technology of steep aspheric surface based on self-adaption polishing tool

Zhen-jun Bao, Heng Zhu, Zhi-gang Li, Ding-yao Yan

Proceedings Volume 10838, 108381S (2019) https://doi.org/10.1117/12.2512179

KEYWORDS: Polishing, Aspheric lenses, Surface finishing, Error analysis, Analytical research, Photovoltaics, Liquids, Spatial frequencies, Baryon acoustic oscillations, Lithium

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Proceedings Article | 12 December 2018 Paper

Research of controlling the optical face of CaF2 crystal elements on optical grinding and polishing

Zhigang Li, Zhongwen Lu, Heng Zhu, Yunti Pu, Zhengjun Bao, Ping Ma

Proceedings Volume 10847, 108470R (2018) https://doi.org/10.1117/12.2505488

KEYWORDS: Polishing, Crystal optics, Optical components, Photovoltaics, Surface finishing

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Proceedings Article | 28 October 2016 Paper

The technical research on fabricating large aperture flat SiC mirror

Heng Zhu, Heng Zhao, Zhenjun Bao, Ding-yao Yan, Ping Ma

Proceedings Volume 9683, 96831S (2016) https://doi.org/10.1117/12.2244014

KEYWORDS: Silicon carbide, Mirrors, Polishing, Surface finishing, Error analysis, Distortion, Shape analysis, Photovoltaics, Space telescopes, Optics manufacturing

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Showing 5 of 15 publications

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