Dr. Richard M. Clare Profile

Dr. Richard M. Clare

Senior Lecturer at Univ of Canterbury

SPIE Involvement:

Author

Publications (24)

Proceedings Article | 30 August 2022 Poster + Paper

Open-loop wavefront sensing of multiple laser sources using the geometric wavefront sensor on an optical test-bench

Sierra Hickman, Stephen Weddell, Richard Clare

Proceedings Volume 12185, 121858C (2022) https://doi.org/10.1117/12.2630541

KEYWORDS: Wavefronts, Atmospheric turbulence, Spatial light modulators, Tomography, Atmospheric optics, Optical testing, Geometrical optics, Wavefront sensors, Adaptive optics

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Proceedings Article | 30 August 2022 Poster + Paper

Surrogate model-based wavefront sensorless adaptive optics system for correcting atmospheric distorted images

Parham Taghinia, Stephen Weddell, Richard Clare, Le Yang

Proceedings Volume 12185, 121853B (2022) https://doi.org/10.1117/12.2627321

KEYWORDS: Atmospheric turbulence, Adaptive optics, Atmospheric modeling, Model-based design, Wavefronts, Zernike polynomials

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Proceedings Article | 29 August 2022 Poster

The GPU-based High-order adaptive OpticS Testbench

Byron Engler, Markus Kasper, Serban Leveratto, Cedric Heritier, Paul Bristow, Christophe Verinaud, Miska Le Louarn, Jalo Nousiainen, Tapio Helin, Markus Bonse, Sascha Quanz, Adrian Glauser, Damien Gratadour, Julien Bernard, Richard Clare

Proceedings Volume 12185, 1218558 (2022) https://doi.org/10.1117/12.2630595

KEYWORDS: Modulation, Wavefront sensors, Mirrors, Wavefronts, Switching, Optical testing, Optical telescopes, Observatories, Large telescopes, Adaptive optics

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SPIE Journal Paper | 2 March 2022 Open Access

Flip-flop modulation method used with a pyramid wavefront sensor to correct piston segmentation on ELTs

Byron Engler, Miska Le Louarn, Christophe Vérinaud, Steve Weddell, Richard Clare

JATIS, Vol. 8, Issue 02, 021502, (March 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.021502

KEYWORDS: Modulation, Adaptive optics, Wavefront sensors, Wavefronts, K band, Point spread functions, Atmospheric turbulence, Telescopes, Actuators, Mirrors

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Test bench demonstration of the geometric wavefront sensor

Sierra Hickman, Steve Weddell, Richard Clare

Proceedings Volume 11448, 1144861 (2020) https://doi.org/10.1117/12.2561166

KEYWORDS: Wavefront sensors, Situational awareness sensors, Image sensors, Satellite imaging, Satellites, Earth's atmosphere, Reconstruction algorithms, Astronomy, Astronomical telescopes, Telescopes

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Proceedings Article | 11 July 2018 Paper

Effects of the telescope spider on extreme adaptive optics systems with pyramid wavefront sensors

Byron Engler, Steve Weddell, Miska Le Louarn, Richard Clare

Proceedings Volume 10703, 107035F (2018) https://doi.org/10.1117/12.2310050

KEYWORDS: Prisms, Telescopes, Adaptive optics, Point spread functions, Reconstruction algorithms, Wavefronts, Spatial filters, Wavefront sensors, Device simulation, Modulation

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Proceedings Article | 10 July 2018 Paper

Slope-based wavefront sensor optimisation with multi-resolution analysis

S. Pal, R. Clare, A. Lambert, S. Weddell

Proceedings Volume 10703, 107032Z (2018) https://doi.org/10.1117/12.2312260

KEYWORDS: Wavefront sensors, Wavefronts, Zernike polynomials, Sensors, Wavelets, Image sensors, Wavefront aberrations, Radon transform, Image processing, Wavelet transforms

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Proceedings Article | 13 September 2012 Paper

Vibrations in AO control: a short analysis of on-sky data around the world

Caroline Kulcsár, Gaetano Sivo, Henri-François Raynaud, Benoît Neichel, Franҫois Rigaut, Julian Christou, Andres Guesalaga, Carlos Correia, Jean-Pierre Véran, Eric Gendron, Fabrice Vidal, Gérard Rousset, Tim Morris, Simone Esposito, Fernando Quiros-Pacheco, Guido Agapito, Enrico Fedrigo, Lorenzo Pettazzi, Richard Clare, Riccardo Muradore, Olivier Guyon, Frantz Martinache, Serge Meimon, Jean-Marc Conan

Proceedings Volume 8447, 84471C (2012) https://doi.org/10.1117/12.925984

KEYWORDS: Adaptive optics, Telescopes, Gemini Observatory, Gemini Planet Imager, Data acquisition, Turbulence, Autoregressive models, Coronagraphy, Visible radiation, Performance modeling

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Proceedings Article | 13 September 2012 Paper

On the rejection of vibrations in adaptive optics systems

Riccardo Muradore, Lorenzo Pettazzi, Enrico Fedrigo, Richard Clare

Proceedings Volume 8447, 844712 (2012) https://doi.org/10.1117/12.927198

KEYWORDS: Adaptive optics, Detection and tracking algorithms, Algorithm development, Image quality, Virtual colonoscopy, Observatories, Data modeling, Autoregressive models, Telescopes, Signal generators

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Proceedings Article | 13 September 2012 Paper

Simulations of adaptive optics systems for the E-ELT

M. Le Louarn, Richard Clare, Clémentine Béchet, Michel Tallon

Proceedings Volume 8447, 84475D (2012) https://doi.org/10.1117/12.925128

KEYWORDS: Adaptive optics, Device simulation, Computer simulations, Stars, Tomography, Telescopes, Atmospheric modeling, Optical simulations, Laser guide stars, Mirrors

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Proceedings Article | 10 November 2011 Paper

E-ELT modeling and simulation toolkits: philosophy and progress status

B. Sedghi, M. Muller, H. Bonnet, M. Esselborn, M. Le Louarn, R. Clare, F. Koch

Proceedings Volume 8336, 833606 (2011) https://doi.org/10.1117/12.915506

KEYWORDS: Adaptive optics, Mirrors, Telescopes, Device simulation, Systems modeling, Wavefronts, Motion models, Actuators, Active optics, Error analysis

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Proceedings Article | 13 July 2010 Paper

Compared performance of different centroiding algorithms for high-pass filtered laser guide star Shack-Hartmann wavefront sensors

Olivier Lardière, Rodolphe Conan, Richard Clare, Colin Bradley, Norbert Hubin

Proceedings Volume 7736, 773627 (2010) https://doi.org/10.1117/12.857742

KEYWORDS: Sodium, Turbulence, Information operations, Wavefront sensors, Adaptive optics, Optical filters, Linear filtering, Photons, Laser guide stars, Monochromatic aberrations

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Proceedings Article | 15 July 2008 Paper

Adaptive optics simulations for the European Extremely Large Telescope

Richard Clare, Miska Le Louarn, Sylvain Oberti, A. Garcia-Rissmann

Proceedings Volume 7015, 701572 (2008) https://doi.org/10.1117/12.787201

KEYWORDS: Adaptive optics, Sodium, Wavefronts, Wavefront sensors, Sensors, LIDAR, Modulation, Device simulation, Optical simulations, Mirrors

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Proceedings Article | 11 July 2006 Paper

The MOAO system of the IRMOS near-infrared multi-object spectrograph for TMT

David Andersen, Stephen Eikenberry, Murray Fletcher, William Gardhouse, Brian Leckie, Jean-Pierre Véran, Don Gavel, Richard Clare, Rafael Guzman, Laurent Jolissaint, Roger Julian, William Rambold

Proceedings Volume 6269, 62694K (2006) https://doi.org/10.1117/12.672177

KEYWORDS: Molybdenum, Mirrors, Monochromatic aberrations, Adaptive optics, Point spread functions, Actuators, Tomography, Charge-coupled devices, Telescopes, Microelectromechanical systems

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Proceedings Article | 28 June 2006 Paper

Sky coverage and tip/tilt error analysis for TMT

Richard Clare, Brent Ellerbroek, Jean-Pierre Véran, Glen Herriot, David Andersen

Proceedings Volume 6272, 627232 (2006) https://doi.org/10.1117/12.669680

KEYWORDS: Adaptive optics, Error analysis, Wavefronts, Sodium, Stars, Telescopes, Monte Carlo methods, Sensors, Servomechanisms, V band

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Proceedings Article | 28 June 2006 Paper

Focus errors from tracking sodium layer altitude variations with laser guide star adaptive optics for the Thirty Meter Telescope

Glen Herriot, Paul Hickson, Brent Ellerbroek, Jean-Pierre Véran, Chiao-Yao She, Richard Clare, Doug Looze

Proceedings Volume 6272, 62721I (2006) https://doi.org/10.1117/12.672081

KEYWORDS: Sodium, Telescopes, Adaptive optics, Wavefronts, Photons, Charge-coupled devices, Stars, Wavefront sensors, Laser guide stars, Thirty Meter Telescope

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Proceedings Article | 27 June 2006 Paper

MIRAO: a mid-IR adaptive optics system design for TMT

Mark Chun, Jay Elias, Brent Ellerbroek, Tim Bond, Ming Liang, Richard Clare, Alan Tokunaga, Matt Richter, Larry Daggert

Proceedings Volume 6272, 62720S (2006) https://doi.org/10.1117/12.670062

KEYWORDS: Adaptive optics, Relays, Telescopes, Mid-IR, Laser guide stars, Mirrors, Stars, Near infrared, Wavefronts, Space telescopes

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Proceedings Article | 27 June 2006 Paper

A conceptual design for the Thirty Meter Telescope adaptive optics systems

B. Ellerbroek, C. Boyer, C. Bradley, M. Britton, S. Browne, R. Buchroeder, J.-L. Carel, M. Cho, M. Chun, R. Clare, R. Conan, L. Daggert, R. Dekany, J. Elias, D. Erickson, R. Flicker, D. Gavel, L. Gilles, P. Hampton, G. Herriot, M. Hunten, R. Joyce, M. Liang, B. Macintosh, R. Palomo, I. Powell, S. Roberts, E. Ruch, J.-C. Sinquin, M. Smith, J. Stoesz, M. Troy, G. Tyler, J.-P. Veran, C. Vogel, Q. Yang

Proceedings Volume 6272, 62720D (2006) https://doi.org/10.1117/12.669422

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Laser guide stars, Wavefronts, Wavefront sensors, Stars, Control systems, Imaging spectroscopy, Imaging systems

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Proceedings Article | 27 June 2006 Paper

NFIRAOS: TMT narrow field near-infrared facility adaptive optics

Glen Herriot, Paul Hickson, B. Ellerbroek, D. Andersen, T. Davidge, D. Erickson, I. Powell, R. Clare, L. Gilles, C. Boyer, M. Smith, L. Saddlemyer, J.-P. Véran

Proceedings Volume 6272, 62720Q (2006) https://doi.org/10.1117/12.672337

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Sodium, Deformable mirrors, Actuators, Sensors, Stars, Laser guide stars, Thirty Meter Telescope

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Proceedings Article | 25 August 2005 Paper

NFIRAOS: TMT facility adaptive optics with conventional DMs

Glen Herriot, Paul Hickson, B. Ellerbroek, David Andersen, T. Davidge, D. Erickson, I. Powell, R. Clare, M. Smith, L. Saddlemyer, J.-P. Veran

Proceedings Volume 5903, 590302 (2005) https://doi.org/10.1117/12.617849

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Control systems, Actuators, Deformable mirrors, Sensors, Laser guide stars, Stars, Thirty Meter Telescope

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Although many of the instruments planned for the TMT (Thirty Meter Telescope) have their own closely-coupled adaptive optics systems, TMT will also have a facility Adaptive Optics (AO) system feeding three instruments on the Nasmyth platform. For this Narrow-Field Infrared Adaptive Optics System, NFIRAOS (pronounced nefarious), the TMT project considered two architectures. One, described in this paper, employs conventional deformable mirrors with large diameters of about 300 mm and this is the reference design adopted by the TMT project. An alternative design based on MEMS was also studied, and is being presented separately in this conference. The requirements for NFIRAOS include 0.8-5 microns wavelength range, 30 arcsecond diameter output field of view (FOV), excellent sky coverage, and diffraction- limited atmospheric turbulence compensation (specified at 133 nm RMS including residual telescope and science instrument errors.) The reference design for NFIRAOS includes multiple sodium laser guide stars over a 70 arcsecond FOV, and an infrared tip/tilt/focus/astigmatism natural guide star sensor within instruments. Larger telescopes require greater deformable mirror (DM) stroke. Although initially NFIRAOS will correct a 10 arcsecond science field, it uses two deformable mirrors in series, partly to provide sufficient stroke for atmospheric correction over the 30 m telescope aperture, but mainly to partially correct a 2 arcminute diameter "technical" field to sharpen near-IR natural guide stars and improve sky coverage. The planned upgrade to full performance includes replacing the groundconjugated DM with a higher actuator density, and using a deformable telescope secondary mirror as a "woofer." NFIRAOS incorporates an instrument rotator and selection of three live instruments: a near-Infrared integral field Imaging spectrograph, a near-infrared echelle spectrograph, and after upgrading NFIRAOS to full multi-conjugation, a wide field (30 arcsecond) infrared camera.

Proceedings Article | 25 October 2004 Paper

Comparison of wavefront sensing with the Shack-Hartmann and pyramid sensors

Richard Clare, Richard Lane

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550986

KEYWORDS: Sensors, Wavefront sensors, Staring arrays, Wavefronts, Modulation, Signal to noise ratio, Image resolution, Spatial resolution, Photons, Zernike polynomials

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Proceedings Article | 24 December 2003 Paper

Wavefront sensing from spatial filtering at the focal plane

Richard Clare, Richard Lane

Proceedings Volume 5169, (2003) https://doi.org/10.1117/12.503543

KEYWORDS: Wavefront sensors, Sensors, Prisms, Modulation, Wavefronts, Spatial filters, Image segmentation, Photons, Turbulence, Fourier transforms

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Proceedings Article | 7 February 2003 Paper

Diffraction limited image restoration by post-compensation from simultaneous speckle and wavefront sensing observations

Richard Lane, Michel Tallon, Eric Thiebaut, Richard Clare

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.462961

KEYWORDS: Wavefront sensors, Calibration, Point spread functions, Deconvolution, Telescopes, Sensors, Wavefronts, Adaptive optics, Speckle, Mirrors

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Proceedings Article | 23 December 2002 Paper

Blind deconvolution of speckle images constrained by wavefront sensing data

W-Y. Valerie Leung, Richard Clare, Richard Lane

Proceedings Volume 4792, (2002) https://doi.org/10.1117/12.452392

KEYWORDS: Wavefront sensors, Speckle, Deconvolution, Point spread functions, Telescopes, Stars, Wavefronts, Photons, Error analysis, Astronomy

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Showing 5 of 24 publications

Conference Committee Involvement (3)

Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2019

14 August 2019 | San Diego, California, United States

Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018

22 August 2018 | San Diego, California, United States

Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017

9 August 2017 | San Diego, California, United States

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