Mr. Xinqi Hu Profile

Xinqi Hu

at Beijing Institute of Technology

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Author

Publications (20)

Proceedings Article | 30 April 2024 Paper

Large dynamic range of secondary position errors detection for the coaxial three-mirror system using dual-branch convolutional neural network

Renliang Jiang, Xiaofang Zhang, Xinqi Hu, Bing Dong

Proceedings Volume 13154, 1315407 (2024) https://doi.org/10.1117/12.3015995

KEYWORDS: Mirrors, Point spread functions, Education and training, Wavefront errors, Wavefront aberrations, Error analysis, Convolutional neural networks, Neural networks, Evolutionary algorithms, Wavefronts

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Proceedings Article | 21 December 2022 Presentation + Paper

An in-orbit correction method based on CNN for the figure errors and component misalignments of TMA telescope

Bingdao Li, Xiaofang Zhang, Yun Gu, Xinqi Hu

Proceedings Volume 12315, 123150T (2022) https://doi.org/10.1117/12.2643878

KEYWORDS: Point spread functions, Telescopes, Wavefront aberrations, Mirrors, Monochromatic aberrations, Wavefront sensors, Wavefronts, Optical instrument design, Neural networks, Network architectures

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Proceedings Article | 8 July 2022 Paper

Phase diversity wavefront sensing based on modified sparrow search algorithm

Qiufeng Ye, Gang Liu, Xinqi Hu, Hongxi Ren, Ming Liu, Menghui Zhang

Proceedings Volume 12282, 122821J (2022) https://doi.org/10.1117/12.2620316

KEYWORDS: Wavefront sensors, Wavefront aberrations, Computer simulations

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Proceedings Article | 12 March 2020 Paper

Performance analysis of software-based methods to expand the dynamic range of Shack-Hartmann wavefront sensor

Yanna Han, Bing Dong, Xinqi Hu

Proceedings Volume 11439, 114390J (2020) https://doi.org/10.1117/12.2542787

KEYWORDS: Wavefront sensors, Microlens array, Computer simulations, Imaging systems, High dynamic range imaging, Zernike polynomials

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Proceedings Article | 19 October 2016 Paper

Study of the performance of image restoration under different wavefront aberrations

Xinqiu Wang, Xinqi Hu

Proceedings Volume 10155, 1015533 (2016) https://doi.org/10.1117/12.2247311

KEYWORDS: Image restoration, Wavefront aberrations, Sensors

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Proceedings Article | 7 August 2015 Paper

Estimating the PSF of space camera based on in-orbit wavefront sensing

Fei Li, Xinqi Hu, Qianqian Sun

Proceedings Volume 9623, 96230A (2015) https://doi.org/10.1117/12.2197121

KEYWORDS: Point spread functions, Error analysis, Sensors, Cameras, Wavefront sensors, Wavefronts, Wavefront aberrations, Image restoration, Image sensors, Reflectivity

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Proceedings Article | 18 November 2014 Paper

An integrated method of measuring wave-front aberrations and optical axis jitters of space camera

Humei Wang, Shitao Wang, Xinqi Hu, Qianqian Sun

Proceedings Volume 9299, 92990Y (2014) https://doi.org/10.1117/12.2072598

KEYWORDS: Wavefront sensors, Cameras, Wavefront aberrations, Error analysis, Integrated optics, Wavefronts, Sensors, Image resolution, CCD image sensors, CMOS sensors

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Proceedings Article | 19 September 2013 Paper

Improved phase retrieval algorithm for optical imaging systems

Shun Qin, Xinqi Hu, Bing Dong, Hongming Zhao, Huijie Du, Hong Yu

Proceedings Volume 8905, 890517 (2013) https://doi.org/10.1117/12.2033703

KEYWORDS: Magnesium, Phase retrieval, Wavefront sensors, High dynamic range imaging, Computer simulations, Wavefronts, Imaging systems, Algorithm development, Optical imaging, James Webb Space Telescope

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Proceedings Article | 19 September 2013 Paper

Diffractive imaging analysis of large-aperture segmented telescope based on partial Fourier transform

Bing Dong, Shun Qin, Xinqi Hu

Proceedings Volume 8905, 890516 (2013) https://doi.org/10.1117/12.2033702

KEYWORDS: Pulmonary function tests, Image segmentation, Segmented mirrors, Telescopes, Space telescopes, Fourier transforms, Mirrors, Error analysis, Device simulation, Point spread functions

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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.

Proceedings Article | 9 November 2010 Paper

Research on calibration of three-mirror reflective space remote sensor using wavefront sensorless method

Xingzi Han, Xin Yu, Xinqi Hu

Proceedings Volume 7849, 784939 (2010) https://doi.org/10.1117/12.882361

KEYWORDS: Wavefronts, Mirrors, Calibration, Reflectivity, Sensors, Photovoltaics, Remote sensing, Astronomical imaging, Wavefront sensors, Control systems

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Proceedings Article | 12 July 2008 Paper

Performance study of photon imaging system for space application

Lei Zhao, Xiaofang Zhang, Yinan Chen, Xinqi Hu, Xin Yu

Proceedings Volume 7010, 70104I (2008) https://doi.org/10.1117/12.788281

KEYWORDS: Signal to noise ratio, Imaging systems, Space telescopes, Mathematical modeling, Photonics systems, Astronomy, Radiometry, Interference (communication), Signal processing, Detection and tracking algorithms

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Proceedings Article | 12 March 2008 Paper

Study of wavefront error and polarization of a side mounted infrared window

Jiaguo Liu, Lin Li, Xinqi Hu, Xin Yu

Proceedings Volume 6624, 66241Y (2008) https://doi.org/10.1117/12.791193

KEYWORDS: Wavefronts, Refractive index, Finite element methods, Polarization, Aerodynamics, Infrared radiation, Birefringence, Thermography, Temperature metrology, Dielectrics

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Proceedings Article | 21 January 2008 Paper

Preliminary analysis and experiment of thermal influence on a large-aperture mirror

Wei-jie Hu, Peng-mei Xu, Hua-Peng Zhang, Lei Zhao, Guang-chun Bian, Xin Yu, Xin-qi Hu

Proceedings Volume 6834, 68342R (2008) https://doi.org/10.1117/12.756243

KEYWORDS: Mirrors, Distortion, Cameras, Space mirrors, Modulation transfer functions, Adaptive optics, Photovoltaics, Optical aberrations, Thermography, Computer simulations

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Proceedings Article | 28 November 2007 Paper

Wavefront error correction with stochastic parallel gradient descent algorithm

Jiaguo Liu, Lin Li, Xinqi Hu, Xin Yu, Lei Zhao

Proceedings Volume 6834, 683413 (2007) https://doi.org/10.1117/12.755623

KEYWORDS: Wavefronts, Actuators, Adaptive optics, Stochastic processes, Mirrors, Control systems, Optimization (mathematics), Computer simulations, Wavefront sensors, Code v

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Proceedings Article | 23 December 2004 Paper

Signal processing of the Shack-Hartmann wavefront sensor operated with extended targets

Xinqi Hu, Dazun Zhao, Xin Yu, Haifeng Shi

Proceedings Volume 5639, (2004) https://doi.org/10.1117/12.580925

KEYWORDS: Wavefront sensors, Sensors, Signal processing, Adaptive optics, Imaging arrays, Computer simulations, Imaging systems, Light sources, Image resolution, CCD image sensors

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Proceedings Article | 5 September 2002 Paper

New centroid computation method using dynamic tracking

Bo Li, Xin Yu, Xinqi Hu

Proceedings Volume 4926, (2002) https://doi.org/10.1117/12.481686

KEYWORDS: Wavefront sensors, Speckle, Charge-coupled devices, Turbulence, Wavefronts, Atmospheric sensing, CCD image sensors, Adaptive optics, Atmospheric optics, Observatories

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Proceedings Article | 5 September 2002 Paper

Mini-adaptive optics system and its experiments

Xinqi Hu, Xin Yu, Dazun Zhao, Genrui Cao, Sen Wang, Weijie Hu, Yuesong Jiang

Proceedings Volume 4926, (2002) https://doi.org/10.1117/12.481668

KEYWORDS: Digital signal processing, Adaptive optics, Deformable mirrors, Mirrors, Sensors, Control systems, Image quality, Reflectivity, Control systems design, Image sensors

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Proceedings Article | 5 September 2002 Paper

New simple laboratory atmosphere turbulence simulator

Bo Li, Xin Yu, Xinqi Hu

Proceedings Volume 4926, (2002) https://doi.org/10.1117/12.481691

KEYWORDS: Turbulence, Zernike polynomials, Atmospheric optics, Wavefronts, Adaptive optics, Resistance, Fluctuations and noise, Atmospheric modeling, Collimation, Aluminum

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Proceedings Article | 30 May 1995 Paper

Photon-counting image-acquisition technique and its applications

Genrui Cao, Xin Yu, Xinqi Hu

Proceedings Volume 2513, (1995) https://doi.org/10.1117/12.209652

KEYWORDS: Photon counting, Imaging systems, CCD cameras, Wavefront sensors, Image intensifiers, Image acquisition, Sensors, Single photon, Adaptive optics, Calibration

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Showing 5 of 20 publications

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