Mr. Jian Du Profile

Jian Du

at Beijing Simulation Ctr

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Publications (6)

Proceedings Article | 24 November 2021 Paper

Weak infrared radiation intensity measurement based on extended Duffing oscillator

Yongming Zhao, Jian Du, Xin Wang, Chang Liu, Zhuo Li, Yan Hao

Proceedings Volume 12061, 120611U (2021) https://doi.org/10.1117/12.2607126

KEYWORDS: Signal to noise ratio, Infrared radiation, Signal detection, Interference (communication), Oscillators, Signal processing, Phase measurement, Sensors, Modulation, Reflectivity

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Proceedings Article | 15 April 2019 Paper

Laser Doppler and micro-Doppler composite signal simulation for vibration characteristics optical sensor of intelligent transportation system

Hongming Zhao, Yang Gao, Jian Du, Ying Zhang, Hong Yu, Qiang Cao

Proceedings Volume 11028, 110281E (2019) https://doi.org/10.1117/12.2520209

KEYWORDS: Doppler effect, Intelligence systems, Optical sensors, Optical simulations, Intelligent sensors, Composites, Target detection, LIDAR, Vibration simulation, Intelligent sensor systems

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Proceedings Article | 15 October 2015 Paper

Colorimetric calibration of coupled infrared simulation system

Ying Zhang, Jindong Fei, Yang Gao, Jian Du

Proceedings Volume 9674, 96742R (2015) https://doi.org/10.1117/12.2202722

KEYWORDS: Infrared imaging, Infrared radiation, Imaging systems, Thermography, Calibration, Temperature metrology, Black bodies, Infrared sensors, Channel projecting optics, Collimators

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Proceedings Article | 3 September 2015 Paper

Complex visible scene projection technology

Hong Yu, Yang Gao, Yi Zhang, Jindong Fei, Huijie Du, Jian Du, Ying Zhang, Hongming Zhao

Proceedings Volume 9578, 95780O (2015) https://doi.org/10.1117/12.2185913

KEYWORDS: LCDs, Optical fibers, Stars, Prisms, Projection systems, Collimation, Imaging systems, Optical spheres, Polarizers, Lenses

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Proceedings Article | 11 September 2013 Paper

The simulation of turbulence effect based on the technology of optical wavefront control

Hongming Zhao, Jindong Fei, Huijie Du, Hong Yu, Jian Du, Xinqi Hu, Bing Dong

Proceedings Volume 8907, 89071W (2013) https://doi.org/10.1117/12.2032833

KEYWORDS: Wavefronts, Atmospheric optics, Adaptive optics, Deformable mirrors, Turbulence, Geometrical optics, Astronomical imaging, Control systems, Wavefront sensors, Atmospheric turbulence

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In the process of high-resolution astronomical observation and space optical mapping, the wavefront aberrations caused by atmosphere turbulence effect lead to reduced resolution of optical imaging sensor. Firstly, on the base of influence of atmosphere turbulence effect for the optical observation system, this paper investigates and analyses the development and technical characteristics of deformable mirror, which is the key device of optical wavefront control technology. In this part, the paper describes the basic principles of wavefront control and measurement using the current production line of deformable mirror, including micro-electromechanical systems (MEMS) deformable mirror which is one of the most promising technology for wavefront modulation and Shack-Hartmann wavefront sensors. Secondly, a new method based on the technology of optical wavefront control and the data of optical path difference (OPD) for simulating the effect of optical transmission induced by turbulence is presented in this paper. The modeling and characteristics of atmosphere turbulence effect applied for optical imagery detector of astronomical observation and space optical mapping has been obtained. Finally, based on the theory model of atmosphere turbulence effects and digital simulation results, a preliminary experiment was done and the results verify the feasibility of the new method. The OPD data corresponding to optical propagation effect through turbulent atmosphere can be achieved by the calculation based on the method of ray-tracing and principle of physical optics. It is a common practice to decompose aberrated wavefronts in series over the Zernike polynomials. These data will be applied to the drive and control of the deformable mirror. This kind of simulation method can be applied to simulate the optical distortions effect, such as the dithering and excursion of light spot, in the space based earth observation with the influence of turbulent atmosphere. With the help of the optical wavefront control technology, the optical sensor and ability of space optical detection system for correcting the target image blurred by turbulence of atmosphere can be tested and evaluated in the laboratory.

SPIE Journal Paper | 5 November 2012

Multitarget compounding technique based on dimpled mirror

Haili Hu, Baojun Zuo, Shouqian Chen, Hong Yu, Yang Gao, Hongming Zhao, Jian Du, Zhigang Fan, Hai Pang

OE, Vol. 51, Issue 11, 113001, (November 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.11.113001

KEYWORDS: Mirrors, Projection systems, Spherical lenses, Receivers, Infrared radiation, Infrared imaging, Aerospace engineering, Geometrical optics, Optical engineering, Cameras

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