Dr. Richard Walker Profile

Dr. Richard Walker

CEO at Photon Force Ltd

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 12 April 2021 Presentation + Paper

Correction of time-resolved SPAD array measurements for accurate single-photon time-resolved biological imaging

Jakub Nedbal, Francesco Mattioli Della Rocca, Richard Walker, Robert Henderson, Klaus Suhling

Proceedings Volume 11721, 117210T (2021) https://doi.org/10.1117/12.2587755

KEYWORDS: Luminescence, Anisotropy, Image sensors, Biological research, Monte Carlo methods, Time correlated photon counting, Microscopy, Data acquisition, Virtual reality, Time metrology

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Proceedings Article | 9 March 2020 Presentation

High speed 2-photon fluorescence lifetime imaging of protein-protein interactions with a swept array microscope (Conference Presentation)

Simon Ameer-Beg, Simon Poland, Thomas Kavanagh, James Levitt, Robert Henderson, Hanning Mai, Andrea Serio, Conor Treacy, Kelly O'Toole, Richard Walker

Proceedings Volume 11244, 112441A (2020) https://doi.org/10.1117/12.2544220

KEYWORDS: Fluorescence lifetime imaging, Microscopes, Laser scanners, Multiphoton microscopy, Microscopy, Live cell imaging, Imaging systems, Cameras, Biosensors, Luminescence

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Proceedings Article | 28 February 2020 Presentation + Paper

Optimised tapered amplifier systems for quantum technologies

L. Prade, A. Selyem, B. Jones, H. Bookey, W. Dorward, D. Bremner, R. Walker, C. Carson, L. McKnight

Proceedings Volume 11295, 112950L (2020) https://doi.org/10.1117/12.2545778

KEYWORDS: Optical amplifiers, LIDAR, Chemical species, Single photon, Photons, Waveguides, Semiconductor lasers, Sensors, Pulsed laser operation, Fiber amplifiers

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Proceedings Article | 17 February 2020 Presentation + Paper

Flow cytometry visualization and real-time processing with a CMOS SPAD array and high-speed hardware implementation algorithm

Hanning Mai, Simon Poland, Francesco Mattioli Della Rocca, Conor Treacy, Justin Aluko, Jakub Nedbal, Ahmet Erdogan, Istvan Gyongy, Richard Walker, Simon Ameer-Beg, Robert Henderson

Proceedings Volume 11243, 112430S (2020) https://doi.org/10.1117/12.2544759

KEYWORDS: Luminescence, Flow cytometry, Microfluidics, Cameras, Particles, Fluorescence lifetime imaging, Visualization, Sensors, Cancer, Time correlated photon counting

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Proceedings Article | 4 October 2018 Presentation + Paper

Advances in CMOS SPAD sensors for LIDAR applications

Istvan Gyongy, Tarek Al Abbas, Neil Finlayson, Nick Johnston, Neil Calder, Ahmet Erdogan, Neale Dutton, Richard Walker, Robert Henderson

Proceedings Volume 10799, 1079907 (2018) https://doi.org/10.1117/12.2501977

KEYWORDS: Sensors, LIDAR, Image sensors, CMOS sensors, Photodetectors, Photon counting, Quenching (fluorescence), Clocks, Imaging systems, Digital electronics

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Proceedings Article | 19 April 2017 Presentation

Multiplexed wavelength-to-time conversion of multimode light (Conference Presentation)

Harikumar Chandrasekharan, Frauke Izdebski, Itandehui Gris-Sánchez, Nikola Krstajić, Richard Walker, Helen Bridle, Paul Dalgarno, William MacPherson, Robert Henderson, Timothy Birks, Robert Thomson

Proceedings Volume 10106, 101060E (2017) https://doi.org/10.1117/12.2252482

KEYWORDS: Quantum optics, Waveguides, Single photon, Multiplexing, Fiber Bragg gratings, Sensors, Image resolution, Picosecond phenomena, Raman spectroscopy, LIDAR

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Proceedings Article | 8 May 2014 Paper

SPADnet: a fully digital, scalable, and networked photonic component for time-of-flight PET applications

Claudio Bruschini, Edoardo Charbon, Chockalingam Veerappan, Leo H. Braga, Nicola Massari, Matteo Perenzoni, Leonardo Gasparini, David Stoppa, Richard Walker, Ahmet Erdogan, Robert Henderson, Steve East, Lindsay Grant, Balázs Játékos, Ferenc Ujhelyi, Gábor Erdei, Emöke Lörincz, Luc André, Laurent Maingault, David Jacolin, L. Verger, Eric Gros d'Aillon, Peter Major, Zoltan Papp, Gabor Nemeth

Proceedings Volume 9129, 912913 (2014) https://doi.org/10.1117/12.2051952

KEYWORDS: Sensors, Positron emission tomography, Scintillators, Photons, CMOS sensors, Crystals, Intelligent sensors, Scintillation, Solar concentrators, Data processing

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Proceedings Article | 17 June 2013 Paper

Improving TCSPC data acquisition from CMOS SPAD arrays

Nikola Krstajić, Simon Poland, David Tyndall, Richard Walker, Simao Coelho, David Li, Justin Richardson, Simon Ameer-Beg, Robert Henderson

Proceedings Volume 8797, 879709 (2013) https://doi.org/10.1117/12.2032807

KEYWORDS: Cameras, Fluorescence lifetime imaging, Microscopes, Luminescence, Sensors, Field programmable gate arrays, Laser scanners, Data acquisition, Single photon, Image resolution

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Proceedings Article | 22 February 2013 Paper

Development of a fast TCSPC FLIM-FRET imaging system

Simon Poland, Simao Coelho, Nikola Krstajić, David Tyndall, Richard Walker, James Monypenny, David Li, Robert Henderson, Simon Ameer-Beg

Proceedings Volume 8588, 85880X (2013) https://doi.org/10.1117/12.2004199

KEYWORDS: Fluorescence resonance energy transfer, Fluorescence lifetime imaging, Spatial light modulators, Luminescence, Sensors, Imaging systems, Microscopes, Cancer, Multiphoton microscopy, Single photon

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Proceedings Article | 22 February 2013 Paper

Multifocal multiphoton microscopy with adaptive optical correction

Simao Coelho, Simon Poland, Nikola Krstajic, David Li, James Monypenny, Richard Walker, David Tyndall, Tony Ng, Robert Henderson, Simon Ameer-Beg

Proceedings Volume 8588, 858817 (2013) https://doi.org/10.1117/12.2000188

KEYWORDS: Fluorescence lifetime imaging, Adaptive optics, Spatial light modulators, Multiphoton microscopy, Microscopy, Photons, Holograms, Optical calibration, Luminescence, Avalanche photodiodes

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SPIE Journal Paper | 1 September 2011 Open Access

Video-rate fluorescence lifetime imaging camera with CMOS single-photon avalanche diode arrays and high-speed imaging algorithm

David Li, David Tyndall, Richard Walker, Justin Richardson, Robert Henderson, Jochen Arlt, David Stoppa, Edoardo Charbon

JBO, Vol. 16, Issue 09, 096012, (September 2011) https://doi.org/10.1117/12.10.1117/1.3625288

KEYWORDS: Fluorescence lifetime imaging, Cameras, Avalanche photodiodes, Luminescence, Rhodamine, CMOS cameras, Signal processing, Imaging systems, Field programmable gate arrays, Confocal microscopy

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Proceedings Article | 9 June 2011 Paper

Automatic laser alignment for multifocal microscopy using a LCOS SLM and a 32×32 pixel CMOS SPAD array

David Tyndall, Richard Walker, Krzysztof Nguyen, Rémi Galland, Jie Gao, Irène Wang, Meike Kloster, Antoine Delon, Robert Henderson

Proceedings Volume 8086, 80860S (2011) https://doi.org/10.1117/12.889738

KEYWORDS: Spatial light modulators, Sensors, Confocal microscopy, Microscopy, Photon counting, Detector arrays, Fluorescence correlation spectroscopy, Fluorescence lifetime imaging, CMOS sensors, Alignment procedures

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Showing 5 of 12 publications

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