Dr. Yongfu Wen Profile

Dr. Yongfu Wen

Research Fellow at Nanyang Technological Univ

SPIE Involvement:

Author

Area of Expertise:

Interferometry , Optical testing , digital holographic microscopy , 3-D measurement , Phase retrieval

Publications (16)

SPIE Journal Paper | 27 July 2022

Comparison of weighted least-squares phase unwrapping algorithms in noise resistance, discontinuity characteristics, convergence speed, and accuracy

Weizhe Cheng, Haobo Cheng, Yongfu Wen, Yunpeng Feng

OE, Vol. 61, Issue 07, 073105, (July 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.7.073105

KEYWORDS: Resistance, Speckle, Optical engineering, Edge detection, Digital holography, Interferometry, Error analysis, Iterative methods, Holography, Denoising

Read Abstract +

SPIE Journal Paper | 27 February 2020

Telephoto structured laser autocollimation based on common-path compensation method and ellipse fitting algorithm

Weizhe Cheng, Haobo Cheng, Yongfu Wen, Yunpeng Feng, Yan Guo, Min Hu

OE, Vol. 59, Issue 02, 024112, (February 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.2.024112

KEYWORDS: Charge-coupled devices, Autocollimation, Reflectors, Optical engineering, Signal to noise ratio, Image segmentation, Optical testing, Collimation, Laser beam propagation, Fluctuations and noise

Read Abstract +

Proceedings Article | 24 July 2018 Paper

Paper

Development of two user-friendly commercial digital holographic microscopes and applications

Yongfu Wen, Haobo Cheng, Yumin Wu, Qihui Pan, Xin Chen, Chao Gao

Proceedings Volume 10827, 108270O (2018) https://doi.org/10.1117/12.2500357

KEYWORDS: Digital holography, Holograms, Holography, Microscopes, 3D image reconstruction, Microscopy, Holography applications

Read Abstract +

Proceedings Article | 17 July 2015 Paper

Paper

Three-dimensional imaging of microstructures by an improved compact digital holographic microscope (ICDHM) with dual wavelength

Yongfu Wen, Weijuan Qu, Haobo Cheng, Anand Asundi

Proceedings Volume 9524, 95242M (2015) https://doi.org/10.1117/12.2190197

KEYWORDS: Digital holography, Holography, Microscopes, Holograms, Microelectromechanical systems, 3D image processing, 3D microstructuring, Microscopy, Charge-coupled devices, Fiber couplers

Read Abstract +

Proceedings Article | 17 July 2015 Paper

Paper

Quantitative phase measurement for wafer-level optics

Weijuan Qu, Yongfu Wen, Zhaomin Wang, Fang Yang, Lei Huang, Chao Zuo

Proceedings Volume 9524, 95242J (2015) https://doi.org/10.1117/12.2189703

KEYWORDS: Digital holography, Phase measurement, Holograms, Wafer-level optics, Digital recording, Phase imaging, Wavefronts, Microscopes, Cameras, Inspection

Read Abstract +

Proceedings Article | 17 July 2015 Paper

Paper

A quantitative phase imaging system based on transport-of-intensity equation

Fang Yang, Zhaomin Wang, Yongfu Wen, Weijuan Qu

Proceedings Volume 9524, 952424 (2015) https://doi.org/10.1117/12.2189622

KEYWORDS: Imaging systems, Cameras, Phase imaging, Phase retrieval, Human-machine interfaces, Analytical research, MATLAB, Photonics, Imaging devices, Digital holography

Read Abstract +

Proceedings Article | 17 July 2015 Paper

Paper

Shape measurement of micro-objects using a common-path digital holographic microscopy (CDHM) with dual wavelength

Yongfu Wen, Weijuan Qu, Zhaomin Wang, Fang Yang, Chee Yuen Cheng

Proceedings Volume 9524, 952422 (2015) https://doi.org/10.1117/12.2189619

KEYWORDS: Digital holography, Microscopy, Holography, Holograms, 3D metrology, Phase measurement, Microscopes, Objectives, Nondestructive evaluation, Molybdenum

Read Abstract +

Proceedings Article | 17 July 2015 Paper

Paper

Digital off-axis holography with angular multiplexing and synthetic aperture

Zhaomin Wang, Weijuan Qu, Fang Yang, Yongfu Wen, Asundi Anand

Proceedings Volume 9524, 95241C (2015) https://doi.org/10.1117/12.2189442

KEYWORDS: Digital holography, Multiplexing, Holograms, Cameras, Holography, Image resolution, CCD cameras, Spatial resolution, 3D image reconstruction, Molybdenum

Read Abstract +

Proceedings Article | 4 March 2015 Paper

Paper

Two-dimensional phase unwrapping algorithms for fringe pattern analysis: a comparison study

Fang Yang, Zhaomin Wang, Yongfu Wen, Weijuan Qu

Proceedings Volume 9302, 93023F (2015) https://doi.org/10.1117/12.2081130

KEYWORDS: Speckle, Fringe analysis, Denoising, Interferometric synthetic aperture radar, Interferometry, Binary data, Photonics, Laser applications, Roads, Reconstruction algorithms

Read Abstract +

Proceedings Article | 4 March 2015 Paper

Paper

Phase errors elimination in compact digital holoscope (CDH) based on a reasonable mathematical model

Yongfu Wen, Weijuan Qu, Cheeyuen Cheng, Zhaomin Wang, Anand Asundi

Proceedings Volume 9302, 930207 (2015) https://doi.org/10.1117/12.2077044

KEYWORDS: Displays, Projection systems, Modulation, Silicon, Image quality, Modulators, Electromechanical design, Image resolution, Diffraction, Mirrors

Read Abstract +

Proceedings Article | 4 March 2015 Paper

Paper

A new phase error compensation method in digital holographic microscopy

Zhaomin Wang, Weijuan Qu, Yongfu Wen, Fang Yang, Anand Asundi

Proceedings Volume 9302, 93023M (2015) https://doi.org/10.1117/12.2076855

KEYWORDS: Digital holography, Zernike polynomials, Wavefronts, Holograms, Monochromatic aberrations, Holography, Microscopy, Optical aberrations, Digital recording, Microlens

Read Abstract +

Proceedings Article | 4 March 2015 Paper

Paper

Capability enhancement in compact digital holographic microscopy

Weijuan Qu, Yongfu Wen, Zhaomin Wang, Fang Yang, Anand Asundi

Proceedings Volume 9302, 93020I (2015) https://doi.org/10.1117/12.2081128

KEYWORDS: Digital holography, Holography, Reflection, Microscopy, Inspection, Microelectromechanical systems, Charge-coupled devices, Holograms, Optical resolution, Spherical lenses

Read Abstract +

Proceedings Article | 19 February 2015 Paper

Paper

A new autofocus method based on angular spectrum method in digital holography

Zhaomin Wang, Weijuan Qu, Fang Yang, Yongfu Wen, Asundi Anand

Proceedings Volume 9449, 94492H (2015) https://doi.org/10.1117/12.2076853

KEYWORDS: Digital holography, Fourier transforms, Wavefronts, Computing systems, Aerospace engineering, Photonics, Holograms, Beam splitters, Laser applications, Roads

Read Abstract +

SPIE Journal Paper | 9 January 2015

Measurement for off-axis aspheric mirror using off-axis annular subaperture stitching interferometry: theory and applications

Yongfu Wen, Haobo Cheng

OE, Vol. 54, Issue 01, 014103, (January 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.1.014103

KEYWORDS: Mirrors, Off axis mirrors, Stitching interferometry, Aspheric lenses, Aspheric optics, Optical engineering, Interferometers, Wavefronts, Wavefront aberrations

Read Abstract +

SPIE Journal Paper | 14 July 2014

Measurement of aspheric surfaces using annular subaperture stitching interferometry based on an automatic positioning method: theory and application

Yongfu Wen, Haobo Cheng

OE, Vol. 53, Issue 07, 074104, (July 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.7.074104

KEYWORDS: Aspheric lenses, Stitching interferometry, Interferometers, Mirrors, Monochromatic aberrations, Photovoltaics, Optical engineering, Optical spheres, Polishing, Objectives

Read Abstract +

SPIE Journal Paper | 8 April 2014

Optimization stitching model for subaperture test of aspheric surfaces

Yongfu Wen, Haobo Cheng

OE, Vol. 53, Issue 04, 044105, (April 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.4.044105

KEYWORDS: Aspheric lenses, Optimization (mathematics), Monochromatic aberrations, Optical engineering, Optical alignment, Interferometers, Adaptive optics, Stitching interferometry, Mirrors, Aberration theory

Read Abstract +

Showing 5 of 16 publications

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement