Dr. Jinfeng Wang Profile

Dr. Jinfeng Wang

at NIAOT

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Publications (6)

Proceedings Article | 29 August 2022 Poster + Presentation + Paper

Uniformity analysis of focal plane efficiency for the Multi-Channel Photometric Survey Telescope (Mephisto)

Zijian Han, Xiangyan Yuan, Zhengyang Li, Jinfeng Wang, Xiaowei Liu, Jie Tian, Ya Huang

Proceedings Volume 12188, 1218842 (2022) https://doi.org/10.1117/12.2637071

KEYWORDS: Telescopes, Transmittance, Reflectivity, Prisms, Astronomy, Reflection, Optical coatings, Large Synoptic Survey Telescope, Image quality

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Proceedings Article | 13 December 2020 Paper

Development of the Multi-channel Photometric Survey telescope

Xiangyan Yuan, Zhengyang Li, Xiaowei Liu, Dongsheng Niu, Qishui Lu, Fanghua Jiang, Yuefei Wang, Xiaoyan Li, YongJun Liang, Hai Wang, Chao Zhang, Jinfeng Wang, Bo Li, Jie Tian, Haiping Lu, Bingqiu Chen, Yang Huang, Xiangkun Liu, Zhengqiu Yao, Xiangqun Cui, Guoping Li

Proceedings Volume 11445, 114457M (2020) https://doi.org/10.1117/12.2562334

KEYWORDS: Telescopes, Optical instrument design, Image quality, Astronomical telescopes, Mirrors, Astronomical imaging, Imaging systems, Cameras, Beam splitters, Coating

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Proceedings Article | 16 October 2012 Paper

The research on making large-size aspherical mirrors by vacuum evaporation technique

Jinfeng Wang

Proceedings Volume 8416, 84160O (2012) https://doi.org/10.1117/12.2009379

KEYWORDS: Aspheric lenses, Mirrors, Polishing, Silicon carbide, Spherical lenses, Surface finishing, Optics manufacturing, Optical components, Telescopes, Astronomical imaging

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Proceedings Article | 22 October 2010 Paper

The design of mirror's temperature control system of three Antarctic Schmidt Telescopes

Jianlin Zhao, Daxing Wang, Xiangyan Yuan, Jinfeng Wang

Proceedings Volume 7658, 765815 (2010) https://doi.org/10.1117/12.864095

KEYWORDS: Mirrors, Control systems, Domes, Telescopes, Control systems design, Astronomy, Temperature metrology, Optical instrument design, Observatories, Astronomical telescopes

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Proceedings Article | 23 July 2008 Paper

Metallic mirror experiment with 1.6 m coating machine

Jinfeng Wang, Liaoyun Qiao, Xinnan Li, Xiangqun Cui

Proceedings Volume 7018, 701851 (2008) https://doi.org/10.1117/12.787081

KEYWORDS: Reflectivity, Mirrors, Silver, Reflectors, Coating, Coating equipment, Aluminum, Electron beams, Astronomy, Astronomical imaging

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Proceedings Article | 29 November 2007 Paper

Design of broadband dielectric coatings for near-infrared Fabry-Perot interferometer

Jinfeng Wang, Weijun Mao, Xiangqun Cui

Proceedings Volume 6722, 672228 (2007) https://doi.org/10.1117/12.783131

KEYWORDS: Fabry–Perot interferometry, Reflectivity, Dielectrics, Fabry–Perot interferometers, Antireflective coatings, Spectral resolution, Dielectric mirrors, Zinc, Visible radiation, Spectrographs

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Fabry-Perot interferometer has an important effect on near-infrared high spectral resolution spectrograph. In 1896, Ch. Fabry and Alfred Perot designed and used the Fabry-Perot interferometer for the first time. Since then the instruments using Fabry-Perot interference phenomena have been applied broadly to multi-field, such as astronomy, laser, and fiber-optic transmission. Fabry-Perot interferometer has many advantages such as narrow passband, high spectral resolution, high throughput, easy wave-length adjustment, simple structure and large aperture. Comparing with traditional visible light, the solar observation in near-infrared has many advantages: for example, weaker magnetic field strength can be more precisely measured with near-infrared spectrum .So developing the key technology of near-infrared high spectral resolution spectrograph--Fabry-Perot interferometer has become urgent. For developing near-infrared Fabry-Perot interferometer, there are four difficulties: producing high quality optical plane: peak-to-valley surface flatness better than λ/100; coating Fabry-Perot interferometer plates with broadband multilayer dielectric films(including spectrum performance, thickness uniformity and stress effects); controlling the distance of interference cavity; keeping constant temperature. In this paper, the process of designing broadband dielectric reflective and antireflective coatings applied in near-infrared Fabry-Perot is described and some problems of designing Fabry-Perot interferometer are discussed: the design of broadband dielectric mirror is described with reflectivity of 93.9±1.0% over spectral ranges from 1.0μm to 1.7μm; by reflective phase shifts in the design of mirror coating, computing the required film thickness uniformity atλ/100 of peak-to-valley surface flatness; degradation of surface figure is perhaps more thanλ/100 even if the soft coating materials-zinc sulfide and cryolite are used, and in order to reduce the degradation of surface figure brought by the stress of dielectric mirror coating, antireflective coating adopts same materials of dielectric mirror coating, ZnS and Na3AlF6, and similar film total thickness.

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