Prof. Duanyi Xu Profile

Prof. Duanyi Xu

Director at Tsinghua Univ

SPIE Involvement:

Author

Publications (69)

Proceedings Article | 22 June 2006 Paper

Modulation code and PRML detection for multi-level run-length-limited DVD channels

Longfa Pan, Hua Hu, Duanyi Xu

Proceedings Volume 6282, 628228 (2006) https://doi.org/10.1117/12.685200

KEYWORDS: Modulation, Digital video discs, Signal detection, Sensors, Signal to noise ratio, Optical recording, Optical storage, Atomic force microscopy, Binary data, Amplitude modulation

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Proceedings Article | 22 June 2006 Paper

Coding and signal processing for three level run-length limited optical recording channel

Qi-Cheng Zhang, Hua Hu, Long-Fa Pan, Duan-Yi Xu, Heng Hu

Proceedings Volume 6282, 628227 (2006) https://doi.org/10.1117/12.685199

KEYWORDS: Optical recording, Signal processing, Digital video discs, Target detection, Modulation, Sensors, Optical storage, Compact discs, Computer programming

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Proceedings Article | 1 February 2006 Paper

Numerical analysis of compound aspheric lens design and fabrication

Qun Hao, Xuemin Cheng, Duanyi Xu

Proceedings Volume 6034, 60341S (2006) https://doi.org/10.1117/12.668166

KEYWORDS: Aspheric lenses, Glasses, Refractive index, Spherical lenses, Tolerancing, Lens design, Optical design, Chemical elements, Refraction, Optimization (mathematics)

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Proceedings Article | 20 January 2006 Paper

Numerical analysis of compound aspheric lens design and fabrication

Duanyi Xu, Qun Hao, Xuemin Cheng

Proceedings Volume 6027, 60273Q (2006) https://doi.org/10.1117/12.668341

KEYWORDS: Aspheric lenses, Glasses, Refractive index, Spherical lenses, Tolerancing, Lens design, Optical design, Chemical elements, Refraction, Optimization (mathematics)

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Proceedings Article | 15 September 2005 Paper

Multi-wavelength and multi-level optical storage based on photochromic materials

Lin He, Duanyi Xu, Hua Hu

Proceedings Volume 5966, 596607 (2005) https://doi.org/10.1117/12.649598

KEYWORDS: Photochromic materials, Optical storage, Absorption, Optical recording, Signal detection, Modulation, Data storage, Prisms, Signal to noise ratio, Signal processing

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Proceedings Article | 15 September 2005 Paper

4-level run-length limited optical storage on photo-chromic materials

Duanyi Xu, Hua Hu, Heng Hu, Longfa Pan

Proceedings Volume 5966, 59660Y (2005) https://doi.org/10.1117/12.649644

KEYWORDS: Optical storage, Modulation, Data storage, Binary data, Phase shift keying, Reflectivity, Optical discs, Compact discs, Digital video discs, Absorption

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Proceedings Article | 15 September 2005 Paper

A measurement method of the transverse focus error detection system

Jianshe Ma, Longfa Pan, Duanyi Xu, Jianyong Zhang

Proceedings Volume 5966, 596625 (2005) https://doi.org/10.1117/12.649826

KEYWORDS: Actuators, Servomechanisms, Error analysis, Digital video discs, Optical storage, Computing systems, Optical discs, Signal detection, Signal generators, Optical engineering

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Proceedings Article | 15 September 2005 Paper

Theoretical study on optical storage of the transmitted-aperture type super-RENS

Duanyi Xu, Rong Liu, Guosheng Qi, Quanhong Shen, Jianshe Ma

Proceedings Volume 5966, 596618 (2005) https://doi.org/10.1117/12.649657

KEYWORDS: Optical storage, Thermal modeling, 3D modeling, Electromagnetism, Finite-difference time-domain method, Dielectrics, Antimony, Super resolution, Gaussian beams, Near field scanning optical microscopy

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Proceedings Article | 15 September 2005 Paper

Modulation codes for multi-level photochromic optical storage

Duanyi Xu, Guosheng Qi, Hua Hu, Heng Hu

Proceedings Volume 5966, 596610 (2005) https://doi.org/10.1117/12.649647

KEYWORDS: Modulation, Optical storage, Computer programming, Data storage, Optical discs, Binary data, Amplitude modulation, Signal processing, Signal detection, Optical recording

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Proceedings Article | 3 January 2005 Paper

Pneumatic sensing system used for focusing in multiwavelength optical disc mastering

Duanyi Xu, Qicheng Zhang, Kun Qian, Guosheng Qi, Hua Hu

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.570354

KEYWORDS: Sensing systems, Control systems, Objectives, Optical discs, Ceramics, Signal detection, Servomechanisms, Head, Optical storage, Feedback signals

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Proceedings Article | 3 January 2005 Paper

Signal processing and coding for multiwavelength and multilevel photochromic optical storage

Hua Hu, Guosheng Qi, Duanyi Xu

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.568672

KEYWORDS: Optical storage, Amplitude modulation, Photochromic materials, Absorption, Signal processing, Modulation, Signal detection, Reflectivity, Optical discs, Binary data

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Proceedings Article | 3 January 2005 Paper

Analysis on control methods of two-stage positioning for high-density optical disk mastering

Guosheng Qi, Duanyi Xu, Jie Song, Quanhong Shen, Peijun Jiang

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.574479

KEYWORDS: Control systems, Computer simulations, Ceramics, Optical discs, Optical storage, Control systems design, Device simulation, Digital signal processing, Actuators, Data storage

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Proceedings Article | 3 January 2005 Paper

Super-resolution optical mastering system using blue laser and high-numeric-aperture lens

Peijun Jiang, Guosheng Qi, Xiaodong Fan, Kun Qian, Duanyi Xu

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.578181

KEYWORDS: Super resolution, Optical filters, Objectives, Laser systems engineering, Near field optics, Laser optics, Control systems, Electron beam lithography, Digital video discs, Collimation

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Proceedings Article | 3 January 2005 Paper

The application of super-RENS mask in high-density mastering

Jie Song, Quanhong Shen, Duanyi Xu, Guosheng Qi

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.574371

KEYWORDS: Antimony, Photomasks, Photoresist materials, Optical storage, Crystals, Near field optics, Semiconductor lasers, Diffraction, Optical discs, Near field

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Proceedings Article | 3 January 2005 Paper

Linear quadratic Gaussian controller design for DVD track following

Guosheng Qi, Duanyi Xu, Jianshe Ma, Heng Hu, Longfa Pan

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.572856

KEYWORDS: Servomechanisms, Digital video discs, Filtering (signal processing), Device simulation, Control systems, Process modeling, Optical tracking, Optical discs, Signal processing, Mathematical modeling

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Proceedings Article | 9 April 2003 Paper

Multiwavelength photochromic storage system and experiment

Hui Zhao, Guosheng Qi, Duanyi Xu, Xuesong Mai

Proceedings Volume 5060, (2003) https://doi.org/10.1117/12.510565

KEYWORDS: Optical storage, Data storage, Absorption, Reflectivity, 3D optical data storage, Absorbance, Optical discs, Photochromic materials, Objectives, Beam splitters

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Proceedings Article | 9 April 2003 Paper

Design of an error-correcting code for two-layer high-capacity optical storage

Duanyi Xu, He xiong Li

Proceedings Volume 5060, (2003) https://doi.org/10.1117/12.510567

KEYWORDS: Optical storage, Forward error correction, Error analysis, Absorption, Data storage, Compact discs, Lithium, Photochromic materials, Reflectivity, Boron

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