Dr. Changcheng Yang Profile

Dr. Changcheng Yang

at Huazhong Institute of Electro-Optics

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Author

Publications (10)

Proceedings Article | 22 May 2009 Paper

Design and fabrication for the diffractive optical element of an infrared system

Changcheng Yang, Shenghui Li, Yong Li, Bin Wang

Proceedings Volume 7282, 72822B (2009) https://doi.org/10.1117/12.830909

KEYWORDS: Diffractive optical elements, Modulation transfer functions, Germanium, Optical design, Infrared imaging, Infrared radiation, Thermography, Chromatic aberrations, Optical fabrication equipment, Diamond turning

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Proceedings Article | 8 January 2008 Paper

Infrared dual spectral imaging system

Hai-tao Wang, An-bing Geng, Chang-cheng Yang, Qiong Cao, Liang-xian Guo

Proceedings Volume 6835, 68350Q (2008) https://doi.org/10.1117/12.754780

KEYWORDS: Infrared imaging, Infrared radiation, Mid-IR, Imaging systems, Imaging spectroscopy, Visible radiation, Germanium, Modulation transfer functions, Target detection, Aspheric lenses

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Proceedings Article | 4 January 2008 Paper

A novel microscanning device

Yun-yi Zhou, Chang-cheng Yang

Proceedings Volume 6836, 683614 (2008) https://doi.org/10.1117/12.760847

KEYWORDS: Actuators, Reflectors, Infrared imaging, Imaging systems, Staring arrays, Infrared radiation, Imaging arrays, Image processing, Spectral resolution, Infrared sensors

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Proceedings Article | 28 November 2007 Paper

Athermalization for infrared dual field-of-view optical system

Changcheng Yang, Shenghui Li

Proceedings Volume 6834, 68342B (2007) https://doi.org/10.1117/12.755636

KEYWORDS: Zoom lenses, Switching, Modulation transfer functions, Optical design, Infrared radiation, Infrared imaging, Infrared zoom, Staring arrays, Relays, Target recognition

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Proceedings Article | 27 November 2007 Paper

NETD test of high-sensitivity infrared camera

Yingwen Li, Debin Pan, Changcheng Yang, Yan Luo

Proceedings Volume 6723, 67233Q (2007) https://doi.org/10.1117/12.783521

KEYWORDS: Infrared cameras, Video, Analog electronics, Frame grabbers, Temperature metrology, Staring arrays, Electro optics, Quantization, Black bodies, Infrared radiation

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Proceedings Article | 14 November 2007 Paper

Optical passive athermalization for infrared zoom system

Shenghui Li, Changcheng Yang, Jia Zheng, Ning Lan, Tao Xiong, Yong Li

Proceedings Volume 6722, 67224E (2007) https://doi.org/10.1117/12.783674

KEYWORDS: Switching, Zoom lenses, Modulation transfer functions, Optical design, Infrared zoom, Diffraction, Relays, Germanium, Zinc, Lithium

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Proceedings Article | 14 November 2007 Paper

Long wavelength infrared dual field-of-view optical system

Tao Xiong, Chang-cheng Yang

Proceedings Volume 6722, 67222O (2007) https://doi.org/10.1117/12.783338

KEYWORDS: Modulation transfer functions, Diffraction, Long wavelength infrared, Staring arrays, Image quality, Zoom lenses, Optical design, Sensors, Temperature metrology, Infrared imaging

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Proceedings Article | 14 November 2007 Paper

Indirect optical thickness monitoring with stationary test-slides for precision optical coatings

XiLin Yao, ChangXin Xiong, ChangCheng Yang, NanChun Tong

Proceedings Volume 6722, 672224 (2007) https://doi.org/10.1117/12.783121

KEYWORDS: Optics manufacturing, Optical coatings, Transmittance, Crystals, Refractive index, Coating, Quartz, Tantalum, Thin films, Linear filtering

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Proceedings Article | 9 June 2006 Paper

Infrared durable protective/antireflection coatings with high performance on Ge and Si substrates

XiLin Yao, ChangXin Xiong, ChangCheng Yang, NanChun Tong

Proceedings Volume 6149, 614908 (2006) https://doi.org/10.1117/12.674195

KEYWORDS: Germanium, Antireflective coatings, Refractive index, Infrared coatings, Infrared radiation, Transmittance, Optical coatings, Silicon, Zinc, Thin films

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Firstly, a reverse synthesis method is outlined for the determination of the optical constants of infrared coatings from transmittance spectrum data by optimizing the physical thickness, refractive index and extinction coefficient, which can apply to all kinds of transmission spectra and do not rely on the existence of interference fringe patterns and the absorption of substrates. A lot of deposition experiments with the ion-assisted deposition (IAD) technique have firstly done about infrared optical materials ZnS, YF3, Ge and DLC (diamond-like-carbon), in order to obtain high dense and low absorbance layers in the 3-5μm and 8-12μm spectral windows. Using the reverse synthesis method, the refractive index and extinction coefficient of these materials have been obtained accurately. The appropriate deposition parameters and the problems from the deposition process are in detail discussed in this paper. YF3 has been then associated with ZnS and Ge layers so as to obtain antireflection coatings with high performance on Ge and Si substrates in 3-5μm and/or 8-12μm range. In addition, a novel multi-layer infrared AR coating utilizing DLC film as one of the low index films has also been developed for Si and Ge substrates. The optical performance is satisfied (average transmittance is no less than 97%, maximum transmittance is more than 98%, from 8μm to 11.5μm), which is better than that of a single film of one quarterwave DLC coating with interior surface multi-layer AR coated on Ge substrates. However, the adhesion between multi-layer AR coatings and DLC coating is not well, leading to coatings falling off from substrates after humidity test and moderate abrasion test, according to MIL-F-48497. Through a lot of experiments, a non-absorbing coating material has been found as bonding layer to solve this problem. The optical properties of three kinds of infrared coatings and the environmental and physical durability test results including high/low temperature test, abrasion test, salt solubility test, etc, are also in detail presented in this paper.

Proceedings Article | 1 February 2006 Paper

Applications of reverse engineering in the fabrication of optical coatings with high performance

XiLin Yao, ChangXin Xiong, ChangCheng Yang, NanChun Tong

Proceedings Volume 6034, 60341I (2006) https://doi.org/10.1117/12.668154

KEYWORDS: Refractive index, Reverse engineering, Reflectivity, Optimization (mathematics), Thin films, Transmittance, Reverse modeling, Coating, Optical coatings, Tantalum

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