Prof. David P. Towers Profile

Prof. David P. Towers

Professor of Mechanical Engineering at Univ of Warwick

SPIE Involvement:

Author

Publications (25)

Proceedings Article | 18 August 2018 Paper

Multi-wavelength phase unwrapping: a versatile tool for extending the measurement range, breaking the Nyquist limit, and encrypting optical communications

Konstantinos Falaggis, Ana Hiza Ramirez-Andrade, David Towers, Catherine Towers, Rosario Porras-Aguilar

Proceedings Volume 10749, 1074913 (2018) https://doi.org/10.1117/12.2321987

KEYWORDS: Interferometers, Interferometry, Phase measurement, Metrology, Phase interferometry, Optical communications

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Proceedings Article | 28 July 2017 Paper

Improvements in low-cost label-free QPI microscope for live cell imaging

C. Seniya, C. Towers, D. Towers

Proceedings Volume 10414, 104140F (2017) https://doi.org/10.1117/12.2282230

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Proceedings Article | 21 February 2017 Paper

Low cost label-free live cell imaging for biological samples

C. Seniya, C. Towers, D. Towers

Proceedings Volume 10074, 100741I (2017) https://doi.org/10.1117/12.2246680

KEYWORDS: Reconstruction algorithms, Live cell imaging, Microscopes, Phase shifting, Phase contrast, Phase modulation, Mirrors, Tissue optics, Phase shifts, Microscopy, Phase measurement

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Proceedings Article | 13 September 2012 Paper

Generalized theory of phase unwrapping: approaches and optimal wavelength selection strategies for multiwavelength interferometric techniques

Konstantinos Falaggis, David Towers, Catherine Towers

Proceedings Volume 8493, 84930O (2012) https://doi.org/10.1117/12.929874

KEYWORDS: CRTs, Interferometers, Interferometry, Reliability, Phase interferometry, Phase measurement, Fringe analysis, Optical metrology, Optimization (mathematics), Metrology

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SPIE Journal Paper | 27 February 2012

Robust color and shape measurement of full color artifacts by RGB fringe projection

Zonghua Zhang, Catherine Towers, David Towers

OE, Vol. 51, Issue 02, 021109, (February 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.2.021109

KEYWORDS: Fringe analysis, Modulation, RGB color model, Composites, Phase shift keying, Projection systems, CCD cameras, Phase shifts, Imaging systems, Digital Light Processing

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Proceedings Article | 3 November 2011 Paper

Unified theory of phase unwrapping approaches in multiwavelength interferometry

Konstantinos Falaggis, David Towers, Catherine Towers

Proceedings Volume 8011, 80117H (2011) https://doi.org/10.1117/12.902646

KEYWORDS: CRTs, Interferometry, Interferometers, Reliability, Phase interferometry, Phase measurement, Optical metrology, Optimization (mathematics), Metrology, Nickel

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Proceedings Article | 3 June 2011 Paper

Extended range metrology: an age old problem

Catherine Towers, David Towers, K. Falaggis

Proceedings Volume 8082, 80821P (2011) https://doi.org/10.1117/12.893283

KEYWORDS: Interferometry, Metrology, Phase measurement, Reliability, Fringe analysis, Error analysis, 3D metrology, Interferometers, Coherence (optics), Inspection

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Proceedings Article | 3 August 2010 Paper

Fast and flexible calibration of a phase-based 3-D imaging system by uneven fringe projection

Zonghua Zhang, Tong Guo, Sixiang Zhang, Xing Fu, Xiaotang Hu, Catherine Towers, David Towers

Proceedings Volume 7790, 77900D (2010) https://doi.org/10.1117/12.860066

KEYWORDS: Calibration, Fringe analysis, Imaging systems, Stereoscopy, CCD cameras, Projection systems, Cameras, Phase measurement, Distance measurement, Digital Light Processing

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Proceedings Article | 3 August 2010 Paper

Theoretical analysis and optimisation of the method of excess fractions for long-range metrology

Konstantinos Falaggis, David Towers, Catherine Towers

Proceedings Volume 7790, 779009 (2010) https://doi.org/10.1117/12.861177

KEYWORDS: Interferometers, Reliability, Metrology, Interferometry, Phase measurement, Tantalum, Systems modeling, Nickel, Performance modeling, Sensors

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Proceedings Article | 11 August 2008 Paper

Shape and colour measurement of colourful objects by fringe projection

Zonghua Zhang, Catherine Towers, David Towers

Proceedings Volume 7063, 70630N (2008) https://doi.org/10.1117/12.794561

KEYWORDS: Fringe analysis, Modulation, Phase shift keying, Chromatic aberrations, Projection systems, RGB color model, Imaging systems, Stereoscopy, 3D acquisition, 3D image processing

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Proceedings Article | 11 August 2008 Paper

A hybrid technique for ultra-high dynamic range interferometry

Konstantinos Falaggis, David Towers, Catherine Towers

Proceedings Volume 7063, 70630X (2008) https://doi.org/10.1117/12.795293

KEYWORDS: Fiber Bragg gratings, Interferometers, Interferometry, Metrology, Phase measurement, Signal detection, Distance measurement, Michelson interferometers, Reliability, Optical amplifiers

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Proceedings Article | 11 August 2008 Paper

Optimum wavelength selection for the method of excess fractions

Konstantinos Falaggis, David Towers, Catherine Towers

Proceedings Volume 7063, 70630V (2008) https://doi.org/10.1117/12.795211

KEYWORDS: Fiber Bragg gratings, Reliability, Interferometers, Interferometry, L band, Signal detection, Metrology, Optical amplifiers, Distance measurement, Ferroelectric materials

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Proceedings Article | 14 August 2006 Paper

Interferometric sensors for application in the bladder and the lower urinary tract

A. McCartney, M. Bialkowski, J. Barton, L. Stewart, C. Towers, W. MacPherson, R. Reuben, D. Towers

Proceedings Volume 6293, 62930L (2006) https://doi.org/10.1117/12.681566

KEYWORDS: Sensors, Silicon, Bladder, Interferometry, Coating, Signal detection, Fiber optics sensors, Spectroscopy, Ocean optics, Diagnostics

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Proceedings Article | 14 August 2006 Paper

Color fringe projection system based on optimum frequency selection

Zonghua Zhang, Catherine Towers, David Towers

Proceedings Volume 6292, 62920S (2006) https://doi.org/10.1117/12.679849

KEYWORDS: Projection systems, Fringe analysis, Chromatic aberrations, Digital Light Processing, Cameras, CCD cameras, Composites, RGB color model, Imaging systems, Optical filters

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Proceedings Article | 14 August 2006 Paper

Wavefront sensing for 3D particle metrology and velocimetry

N. Angarita-Jaimes, E. McGhee, M. Chennaoui, H. Campbell, S. Zhang, C. Towers, A. Greenaway, D. Towers

Proceedings Volume 6292, 62920K (2006) https://doi.org/10.1117/12.681561

KEYWORDS: Particles, Image segmentation, Image processing, Wavefronts, Wavefront sensors, 3D metrology, Metrology, Calibration, Imaging systems, 3D image processing

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Proceedings Article | 2 August 2004 Paper

Generalized multifrequency interferometric techniques for absolute phase measurement

Catherine Towers, David Towers, Julian Jones

Proceedings Volume 5531, (2004) https://doi.org/10.1117/12.562578

KEYWORDS: Reliability, Phase measurement, Interferometry, Projection systems, CRTs, Interferometers, Heterodyning, Ranging, CCD cameras, Computer simulations

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Proceedings Article | 9 June 2004 Paper

Generalized multifrequency selection for full-field interferometric shape measurement

Catherine Towers, David Towers, Julian Jones

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566651

KEYWORDS: Interferometry, Reliability, CRTs, Phase measurement, Interferometers, Projection systems, Heterodyning, Computer simulations, CCD cameras, Sensors

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Proceedings Article | 31 August 2000 Paper

Two-wavelength contouring for shape and deformation measurement

Martin Dale, Clive Buckberry, David Towers

Proceedings Volume 4076, (2000) https://doi.org/10.1117/12.397947

KEYWORDS: Data modeling, Holography, Cameras, Speckle, Speckle pattern, Wavefronts, Nd:YAG lasers, Measurement devices, Holograms, CCD cameras

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Proceedings Article | 14 June 1995 Paper

Phase stepping and heterodyning in a fiber-based speckle shearing interferometer

Jesus Valera, Julian Jones, David Towers, Clive Buckberry

Proceedings Volume 2544, (1995) https://doi.org/10.1117/12.211863

KEYWORDS: Speckle, Polarization, Shearing interferometers, Phase shift keying, Modulation, Phase modulation, Heterodyning, Ferroelectric materials, Prisms, Optical fibers

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Proceedings Article | 23 November 1994 Paper

Combined measurement of complex vibrational modes and surface form for noise radiation prediction

David Towers, Clive Buckberry, B. Stockley, M. Jones

Proceedings Volume 2249, (1994) https://doi.org/10.1117/12.196068

KEYWORDS: 3D vision, Vibrometry, Holography, Phase measurement, Cameras, Phase shift keying, 3D metrology, Projection systems, Fiber optics, CCD cameras

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Proceedings Article | 5 February 1993 Paper

Application of automatic fringe analysis techniques in the automotive industry

Clive Buckberry, David Towers

Proceedings Volume 1755, (1993) https://doi.org/10.1117/12.140778

KEYWORDS: Fringe analysis, Holography, Photoelasticity, Moire patterns, Interferometry, 3D modeling, Image processing, Modal analysis, Image enhancement, Head

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Proceedings Article | 1 January 1992 Paper

Particle imaging techniques and applications

C. Towers, David Towers, Peter Bryanston-Cross, J. Gass, John Judge

Proceedings Volume 1553, (1992) https://doi.org/10.1117/12.135324

KEYWORDS: Particles, Holography, Diffraction, Imaging systems, Cameras, Photography, CCD cameras, Velocity measurements, CCD image sensors, Pulsed laser operation

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Proceedings Article | 1 January 1992 Paper

Visualization and analysis of three-dimensional transonic flows by holographic interferometry

David Towers, C. Towers, Peter Bryanston-Cross, K. Fry, A. Harris

Proceedings Volume 1553, (1992) https://doi.org/10.1117/12.135323

KEYWORDS: Visualization, Holographic interferometry, Cameras, Diagnostics, Holography, Holograms, Laser interferometry, Visual analytics, 3D visualizations, Turbulence

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SPIE Journal Paper | 1 April 1991

Analysis of holographic fringe data using the dual reference approach

David Towers, John Judge, Peter Bryanston-Cross

OE, Vol. 30, Issue 04, (April 1991) https://doi.org/10.1117/12.10.1117/12.55810

KEYWORDS: Holography, Holograms, Image processing, Fringe analysis, Beam splitters, 3D image reconstruction, CCD cameras, Digital holography, Pulsed laser operation, Polarization

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Proceedings Article | 1 April 1991 Paper

Laser light sheet investigation into transonic external aerodynamics

C. Towers, David Towers, John Judge, Peter Bryanston-Cross

Proceedings Volume 1358, (1991) https://doi.org/10.1117/12.23989

KEYWORDS: Particles, Cameras, CCD cameras, Visualization, Pulsed laser operation, Video, 3D image processing, Image processing, Light scattering, Imaging systems

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Showing 5 of 25 publications

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