Dr. Qichang An Profile

Dr. Qichang An

at CIOMP

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Author

Publications (11)

Proceedings Article | 11 January 2019 Paper

Preliminary design of moment correction system for large optical components

Hongchao Zhao, Fei Yang, Peng Guo, Qichang An, Haibo Jiang, Jingxu Zhang

Proceedings Volume 10837, 108370Q (2019) https://doi.org/10.1117/12.2507338

KEYWORDS: Mirrors, Monochromatic aberrations, Telescopes, Surface finishing, Off axis mirrors, Actuators, Optical components, Finite element methods, Manufacturing, Active optics

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Proceedings Article | 11 January 2019 Paper

Mirror seeing and its evaluation

Fei Yang, Hongchao Zhao, Qichang An, Peng Guo, Haibo Jiang, Pengfei Guo, Jing Zhang

Proceedings Volume 10837, 108370O (2019) https://doi.org/10.1117/12.2506717

KEYWORDS: Mirrors, Wavefronts, Telescopes, Turbulence, Point spread functions, Statistical analysis, Atmospheric optics, Convection, Simulink, Mechanics

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Proceedings Article | 11 January 2019 Paper

Normalized point source sensitivity analysis for GSSM of TMT

Fei Yang, Hongchao Zhao, Qichang An, Peng Guo, Haibo Jiang, Haifeng Cao, Jing Zhang

Proceedings Volume 10837, 108370N (2019) https://doi.org/10.1117/12.2506716

KEYWORDS: Thirty Meter Telescope, Mirrors, Telescopes, Optical transfer functions, Error analysis, Wavefronts, Imaging systems, Mechanics, Physics, Inspection

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Proceedings Article | 11 January 2019 Paper

Analysis and correction about measurement error of edge sensor caused by guide flexure applied in the support system assembly of Thirty Meter Telescope

Haifeng Cao, Jingxu Zhang, Fei Yang, Qichang An, Hongchao Zhao, Peng Guo

Proceedings Volume 10837, 108370L (2019) https://doi.org/10.1117/12.2505860

KEYWORDS: Sensors, Mirrors, Actuators, Error analysis, Segmented mirrors, Thirty Meter Telescope, Control systems, Image segmentation, Kinematics, Telescopes

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Proceedings Article | 6 July 2018 Paper

Pre-construction results of giant steerable science mirror for TMT

Fei Yang, Hongchao Zhao, Qichang An, Peng Guo, Haibo Jiang, Pengfei Guo, Jing Zhang

Proceedings Volume 10700, 1070037 (2018) https://doi.org/10.1117/12.2310057

KEYWORDS: Mirrors, Prototyping, Interfaces, Thirty Meter Telescope, Telescopes, Optical fabrication, Finite element methods, Calibration, Surface finishing, Mechanics

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Proceedings Article | 27 July 2016 Paper

Pre-construction progress of giant steerable science mirror for TMT

Fei Yang, Hongchao Zhao, Qichang An, Peng Guo, Haibo Jiang, Linchu Han, Virginia Ford, Glen Cole, Byron Smith, Marvin Campbell

Proceedings Volume 9906, 99064M (2016) https://doi.org/10.1117/12.2232068

KEYWORDS: Thirty Meter Telescope, Mirrors, Prototyping, Telescopes, Polishing, Optical fabrication, Interfaces, Calibration, Motion measurement, Surface finishing

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The Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) team is developing the Giant Steerable Science Mirror (GSSM) for Thirty Meter Telescope (TMT) which will enter the preliminary design phase in 2016. The GSSM is the tertiary mirror of TMT and consists of the world’s largest flat telescope mirror (approximately 3.4m X 2.4 m X 100mm thick) having an elliptical perimeter positioned with an extremely smooth tracking and pointing mechanism in a gravity-varying environment. In order to prepare for developing this unique mirror system, CIOMP has been developing a 1/4 scale, functionally accurate version of the GSSM prototype during the pre-construction phase of GSSM. The prototype will incorporate the same optomechanical system and servo control system as the GSSM. The size of the prototype mirror is 898.5mm×634mm×12.5mm with an elliptical perimeter. The mirror will be supported axially by an 18 point whiffletree and laterally with a 12 point whiffletree. The main objective of the preconstruction phase includes requirement validation and risk reduction for GSSM and to increase confidence that the challenge of developing the GSSM can be met. The precision mechanism system and the optical mirror polishing and testing have made good progress. CIOMP has completed polishing the mirror, the prototype mechanism is nearly assembled, some testing has been performed, and additional testing is being planned and prepared. A dummy mirror is being integrated into the cell assembly prototype to verify the design, analysis and interface and will be used when testing the prototype positioner tilt and rotation motions. The prototype positioner tilt and rotator structures have been assembled and tested to measure each subsystem’s jitter and dynamic motion. The mirror prototype has been polished and tested to verify the polishing specification requirement and the mirror manufacturing process. The complete assembly, integration and verification of the prototype will be soon finished. Final testing will verify the prototype requirements including mounted mirror surface figure accuracy in 5 different orientations; rotation and tilt motion calibration and pointing precision; motion jitter; and internally generated vibrations. CIOMP has scheduled to complete the prototype by the end of July 2016. CIOMP will get the sufficient test results during the pre-construction phase to prepare to enter the preliminary design for GSSM.

Proceedings Article | 2 September 2015 Paper

Pre-construction of giant steerable science mirror for TMT

Fei Yang, Hongchao Zhao, Peng Guo, Qichang An, Haibo Jiang

Proceedings Volume 9573, 95730T (2015) https://doi.org/10.1117/12.2185507

KEYWORDS: Mirrors, Prototyping, Telescopes, Interfaces, 3D modeling, Control systems, Solids, Relays, Distortion, Thirty Meter Telescope

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Proceedings Article | 18 November 2014 Paper

Power spectral density specification and analysis of system optical jitter

Qi-Chang An, Fei Yang, Peng Guo, Xiang-Yi Liu

Proceedings Volume 9298, 929814 (2014) https://doi.org/10.1117/12.2069767

KEYWORDS: Wavefronts, Telescopes, Stochastic processes, National Ignition Facility, Large telescopes, Laser systems engineering, Mirrors, Optical components, Error analysis, Mechanics

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Proceedings Article | 18 September 2014 Paper

Analysis of power spectral density as a performance metric for TMT M3

Fei Yang, Qi-Chang An, Fu-Guo Wang, Xiang-Yi Liu

Proceedings Volume 9282, 92820C (2014) https://doi.org/10.1117/12.2069400

KEYWORDS: Mirrors, Wavefronts, Spatial frequencies, Turbulence, Zernike polynomials, Telescopes, Atmospheric modeling, Error analysis, Large telescopes, Thirty Meter Telescope

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Proceedings Article | 2 September 2014 Paper

Study on the sensitivity of temperature gradient for large aperture SiC lightweight mirror based on active optics

Xiangyi Liu, Jingxu Zhang, Xiaoxia Wu, Jianfeng Li, Peng Guo, Qichang An

Proceedings Volume 9280, 92800I (2014) https://doi.org/10.1117/12.2069485

KEYWORDS: Mirrors, Silicon carbide, Lightweight mirrors, Telescopes, Image quality, Active optics, Error analysis, Control systems, Wavefronts, Temperature metrology

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Proceedings Article | 2 September 2014 Paper

Study of tilt axis bearing arrangement for M3S of TMT project

Hongchao Zhao, Jingxu Zhang, Fei Yang, Qichang An, Yanqin Su, Peng Guo

Proceedings Volume 9280, 92800M (2014) https://doi.org/10.1117/12.2068924

KEYWORDS: Telescopes, Mirrors, Finite element methods, 3D modeling, Modal analysis, Chemical elements, Mirror pointing, Optical instrument design, Astronomy, Thirty Meter Telescope

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Showing 5 of 11 publications

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