Prof. Timothy A. Cook Profile

Prof. Timothy A. Cook

Associate Professor at Univ of Massachusetts Lowell

SPIE Involvement:

Author

Publications (36)

Proceedings Article | 9 September 2019 Paper

The low-order wavefront control system for the PICTURE-C mission: deformable mirror anti-aliasing through temporal dithering

Kuravi Hewawasam, Christopher Mendillo, Glenn Howe, Jason Martel, Susanna Finn, Timothy Cook, Julien Charton, Pierre Mahiou, Supriya Chakrabarti

Proc. SPIE. 11117, Techniques and Instrumentation for Detection of Exoplanets IX

KEYWORDS: Actuators, Mirrors, Clocks, Interfaces, Wavefront sensors, Wavefronts, Control systems, Deformable mirrors, Coronagraphy, Analog electronics

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Proceedings Article | 9 September 2019 Paper

Decoupling the image-plane and low-order wavefront sensors for the PICTURE-C coronagraph

Christopher Mendillo, Kuravi Hewawasam, Glenn Howe, Jason Martel, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 11117, Techniques and Instrumentation for Detection of Exoplanets IX

KEYWORDS: Cameras, Sensors, Calibration, Wavefront sensors, Wavefronts, Control systems, Deformable mirrors, Coronagraphy, Exoplanets, CCD cameras

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Proceedings Article | 9 September 2019 Presentation + Paper

The PICTURE-C exoplanetary direct imaging balloon mission: first flight preparation

Christopher Mendillo, Kuravi Hewawasam, Glenn Howe, Jason Martel, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 11117, Techniques and Instrumentation for Detection of Exoplanets IX

KEYWORDS: Telescopes, Mirrors, Stars, Cameras, Sensors, Calibration, Wavefront sensors, Wavefronts, Control systems, Coronagraphy

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SPIE Journal Paper | 14 May 2019

Polarization aberration analysis for the PICTURE-C exoplanetary coronagraph

Christopher Mendillo, Glenn Howe, Kuravi Hewawasam, Jason Martel, Timothy Cook, Supriya Chakrabarti

JATIS Vol. 5 Issue 02

KEYWORDS: Polarization, Coronagraphy, Coating, Mirrors, Ray tracing, Geometrical optics, Wavefronts, Telescopes, Reflection, Reflectivity

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SPIE Journal Paper | 9 March 2018

Wavefront sensing in space: flight demonstration II of the PICTURE sounding rocket payload

Ewan Douglas, Christopher Mendillo, Timothy Cook, Kerri Cahoy, Supriya Chakrabarti

JATIS Vol. 4 Issue 01

KEYWORDS: Space telescopes, Wavefront sensors, Wavefronts, Coronagraphy, Mirrors, Actuators, Rockets, Telescopes, Phase measurement, Interferometers

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Proceedings Article | 1 September 2017 Paper

The low-order wavefront control system for the PICTURE-C mission: high-speed image acquisition and processing

Kuravi Hewawasam, Christopher Mendillo, Glenn Howe, Jason Martel, Susanna Finn, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 10400, Techniques and Instrumentation for Detection of Exoplanets VIII

KEYWORDS: Imaging systems, Image processing, Computing systems, Image acquisition, Wavefront sensors, Wavefronts, Control systems, Exoplanets, Operating systems

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Proceedings Article | 1 September 2017 Presentation + Paper

Optical tolerances for the PICTURE-C mission: error budget for electric field conjugation, beam walk, surface scatter, and polarization aberration

Christopher Mendillo, Glenn Howe, Kuravi Hewawasam, Jason Martel, Susanna Finn, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 10400, Techniques and Instrumentation for Detection of Exoplanets VIII

KEYWORDS: Polarization, Imaging systems, Scattering, Adaptive optics, Exoplanets, Optical fabrication, Tolerancing

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Proceedings Article | 1 September 2017 Paper

The low-order wavefront control system for the PICTURE-C mission: preliminary testbed results from the Shack-Hartmann sensor

Glenn Howe, Christopher Mendillo, Kuravi Hewawasam, Jason Martel, Susanna Finn, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 10400, Techniques and Instrumentation for Detection of Exoplanets VIII

KEYWORDS: Telescopes, Mirrors, Stars, Imaging systems, Sensors, Wavefront sensors, Wavefronts, Control systems, Deformable mirrors

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Proceedings Article | 29 July 2016 Paper

Wavefront sensing in space from the PICTURE-B sounding rocket

Ewan Douglas, Christopher Mendillo, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave

KEYWORDS: Actuators, Monochromatic aberrations, Mirrors, Rockets, Ferroelectric materials, Wavefront sensors, Wavefronts, Coronagraphy, Phase measurement, Visibility

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SPIE Journal Paper | 17 December 2015

Capabilities and performance of dual-wavelength Echidna^® lidar

Glenn Howe, Kuravi Hewawasam, Ewan Douglas, Jason Martel, Zhan Li, Alan Strahler, Crystal Schaaf, Timothy Cook, Supriya Chakrabarti

JRS Vol. 9 Issue 01

KEYWORDS: LIDAR, Spatial resolution, Signal to noise ratio, Reflectivity, Calibration, Vegetation, Pulsed laser operation, Scattering, Laser scanners, Short wave infrared radiation

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Proceedings Article | 16 September 2015 Paper

The low-order wavefront sensor for the PICTURE-C mission

Christopher Mendillo, Joshua Brown, Jason Martel, Glenn Howe, Kuravi Hewawasam, Susanna Finn, Timothy Cook, Supriya Chakrabarti, Ewan Douglas, Dimitri Mawet, Olivier Guyon, Garima Singh, Julien Lozi, Kerri Cahoy, Anne Marinan

Proc. SPIE. 9605, Techniques and Instrumentation for Detection of Exoplanets VII

KEYWORDS: Telescopes, Mirrors, Visible radiation, Stars, Data modeling, Sensors, Wavefront sensors, Wavefronts, Control systems, Coronagraphy

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Proceedings Article | 16 September 2015 Paper

End-to-end simulation of high-contrast imaging systems: methods and results for the PICTURE mission family

Ewan Douglas, Kuravi Hewawasam, Christopher Mendillo, Kerri Cahoy, Timothy Cook, Susanna Finn, Glenn Howe, Marc Kuchner, Nikole Lewis, Anne Marinan, Dimitri Mawet, Supriya Chakrabarti

Proc. SPIE. 9605, Techniques and Instrumentation for Detection of Exoplanets VII

KEYWORDS: Point spread functions, Telescopes, Mirrors, Rockets, Sensors, Wavefronts, Coronagraphy, Wave propagation, Space telescopes, Device simulation

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SPIE Journal Paper | 11 September 2015

Planetary Imaging Concept Testbed Using a Recoverable Experiment–Coronagraph (PICTURE C)

Timothy Cook, Kerri Cahoy, Supriya Chakrabarti, Ewan Douglas, Susanna Finn, Marc Kuchner, Nikole Lewis, Anne Marinan, Jason Martel, Dimitri Mawet, Benjamin Mazin, Seth Meeker, Christopher Mendillo, Gene Serabyn, David Stuchlik, Mark Swain

JATIS Vol. 1 Issue 04

KEYWORDS: Coronagraphy, Planets, Imaging systems, Telescopes, Stars, Exoplanets, Mirrors, Sensors, Wavefronts, Infrared imaging

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SPIE Journal Paper | 28 October 2014

Interferometric nulling limits with tip-tilt-piston deformable mirrors and a pinhole spatial filter array

Supriya Chakrabarti, Timothy Cook, Brian Hicks

JATIS Vol. 1 Issue 01

KEYWORDS: Wavefronts, Spatial filters, Deformable mirrors, Signal to noise ratio, Interferometry, Image segmentation, Spatial frequencies, Targeting Task Performance metric, Nulling interferometry, Point spread functions

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Proceedings Article | 15 September 2014 Paper

LITES and GROUP-C: multi-sensor ionospheric imaging from the ISS

Andrew Stephan, Scott Budzien, Susanna Finn, Timothy Cook, Supriya Chakrabarti, Steven Powell, Mark Psiaki

Proc. SPIE. 9222, Imaging Spectrometry XIX

KEYWORDS: Spectrographs, Sensors, Calibration, Satellites, Ultraviolet radiation, Receivers, Scintillation, Photometry, Airglow, Global Positioning System

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Proceedings Article | 26 September 2013 Paper

Direct imaging of exoplanetary systems with a monolithic multispectral camera

Brian Hicks, Kathleen Oram, Nikole Lewis, Christopher Mendillo, Paul Bierden, TImothy Cook, Supriya Chakrabarti

Proc. SPIE. 8864, Techniques and Instrumentation for Detection of Exoplanets VI

KEYWORDS: Diffraction, Point spread functions, Mirrors, Imaging systems, Cameras, Sensors, Wavefront sensors, Wavefronts, Exoplanets, Nulling interferometry

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Proceedings Article | 21 September 2012 Paper

PICTURE: a sounding rocket experiment for direct imaging of an extrasolar planetary environment

Christopher Mendillo, Brian Hicks, Timothy Cook, Thomas Bifano, David Content, Benjamin Lane, B. Martin Levine, Douglas Rabin, Shanti Rao, Rocco Samuele, Edouard Schmidtlin, Michael Shao, J. Kent Wallace, Supriya Chakrabarti

Proc. SPIE. 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave

KEYWORDS: Telescopes, Mirrors, Rockets, Ferroelectric materials, Interferometers, Cameras, Calibration, Space telescopes, National Ignition Facility, Nulling interferometry

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SPIE Journal Paper | 1 February 2012

High-throughput and multislit imaging spectrograph for extended sources

Supriya Chakrabarti, Olli-Pekka Jokiaho, Jeffrey Baumgardner, Timothy Cook, Jason Martel, Marina Galand

OE Vol. 51 Issue 1

KEYWORDS: Spectrographs, Spectral resolution, Optical filters, Sensors, Auroras, Image filtering, Airglow, Interference filters, Charge-coupled devices, Visible radiation

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Proceedings Article | 22 July 2010 Paper

Progress in the development of MANIC: a monolithic nulling interferometer for characterizing extrasolar environments

Brian Hicks, Timothy Cook, Benjamin Lane, Supriya Chakrabarti

Proc. SPIE. 7734, Optical and Infrared Interferometry II

KEYWORDS: Mirrors, Prisms, Ferroelectric materials, Spatial filters, Interferometers, Sensors, Wavefronts, Adaptive optics, Exoplanets, Nulling interferometry

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Proceedings Article | 20 August 2009 Paper

The Monolithic Achromatic Nulling Interference Coronagraph (MANIC) testbed

Brian Hicks, Timothy Cook, Benjamin Lane, Christopher Mendillo, Paul Jung, Supriya Chakrabarti

Proc. SPIE. 7440, Techniques and Instrumentation for Detection of Exoplanets IV

KEYWORDS: Mirrors, Prisms, Beam splitters, Ferroelectric materials, Polarization, Sensors, Adaptive optics, Coronagraphy, Exoplanets, Nulling interferometry

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Proceedings Article | 8 February 2008 Paper

Path length control in a nulling coronagraph with a MEMS deformable mirror and a calibration interferometer

Shanti Rao, J. Kent Wallace, Rocco Samuele, Supriya Chakrabarti, Timothy Cook, Brian Hicks, Paul Jung, Benjamin Lane, B. Martin Levine, Chris Mendillo, Edouard Schmidtlin, Mike Shao, Jason Stewart

Proc. SPIE. 6888, MEMS Adaptive Optics II

KEYWORDS: Microelectromechanical systems, Actuators, Mirrors, Interferometers, Cameras, Calibration, Deformable mirrors, Coronagraphy, Nulling interferometry, Targeting Task Performance metric

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Proceedings Article | 2 October 2006 Paper

Design and development of high quantum efficiency large area UV focal plane arrays for photon counting applications

E. Egerton, Ashok Sood, Robert Bell, Yash Puri, Jacob Roginsky, Melville Ulmer, Bruce Wessels, Timothy Cook

Proc. SPIE. 6389, Active and Passive Optical Components for Communications VI

KEYWORDS: Staring arrays, Photon counting, Sensors, Etching, Ultraviolet radiation, Microchannel plates, Ions, Silicon, Quantum efficiency, Gallium nitride

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Proceedings Article | 7 September 2006 Paper

Design considerations of ROIC for single color LWIR and multicolor IR focal plane arrays

Ashok Sood, James Egerton, Yash Puri, Latika Becker, Timothy Cook, Fouad Kiamilev

Proc. SPIE. 6294, Infrared and Photoelectronic Imagers and Detector Devices II

KEYWORDS: Staring arrays, Readout integrated circuits, Long wavelength infrared, CMOS sensors, Mercury cadmium telluride, Sensors, Silicon, Interference (communication), Amplifiers, Photodiodes

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Proceedings Article | 23 January 2006 Paper

Design and development of a 329-segment tip-tilt piston mirror array for space-based adaptive optics

Jason Stewart, Thomas Bifano, Paul Bierden, Steven Cornelissen, Timothy Cook, B. Martin Levine

Proc. SPIE. 6113, MEMS/MOEMS Components and Their Applications III

KEYWORDS: Microelectromechanical systems, Actuators, Oxides, Mirrors, Polishing, Silicon, Surface roughness, Coronagraphy, Planets, Electromechanical design

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Proceedings Article | 24 February 2003 Paper

A detector system for SPIDR, A mission to perform spectroscopy and photometry of the IGM's diffuse radiation

Jonathan Lapington, Supriya Chakrabarti, Timothy Cook, Robert Goeke, J. Gsell, V. Gsell

Proc. SPIE. 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation

KEYWORDS: Spectrographs, Electronics, Sensors, Electrodes, Spectroscopy, Microchannel plates, Image sensors, Photometry, Analog electronics, Prototyping

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Proceedings Article | 24 February 2003 Paper

A self-compensating all-reflective interferometric echelle space telescope

Timothy Cook

Proc. SPIE. 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation

KEYWORDS: Telescopes, Mirrors, Stars, Sensors, Spectroscopy, Ultraviolet radiation, Interferometry, Space telescopes, Spectral resolution, Diffraction gratings

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Proceedings Article | 24 February 2003 Paper

Spectroscopy and photometry of IGM's diffuse radiations (SPIDR): a NASA small explorer mission

Supriya Chakrabarti, Mark Bautz, Claude Canizares, Renyue Cen, Timothy Cook, Nahide Craig, Alexander Dalgarno, Carl Heiles, Edward Jenkins, Jonathan Lapington, H. Miller, Jeremiah Ostriker, Kenneth Sembach, J. Shull, Adolf Witt

Proc. SPIE. 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation

KEYWORDS: Spectrographs, Astronomy, Sensors, Spectroscopy, Imaging spectroscopy, Photometry, Lanthanum, Space operations, Galactic astronomy, Astrophysics

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Proceedings Article | 28 August 1998 Paper

Spectral imagery in the far ultraviolet: results from a sounding rocket experiment

Supriya Chakrabarti, Valerie Taylor, Timothy Cook, Andrew Stephan, Daniel Cotton, Farzad Kamalabadi

Proc. SPIE. 3356, Space Telescopes and Instruments V

KEYWORDS: Signal to noise ratio, Optical components, Spectrographs, Rockets, Stars, Sensors, Imaging spectroscopy, Tomography, Extreme ultraviolet, Far ultraviolet

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Proceedings Article | 12 June 1995 Paper

Spectrograph for photometric imaging with numeric reconstruction (SPINR) simulations

Andrew Stephan, Yan Betremieux, Timothy Cook, Daniel Cotton, Supriya Chakrabarti

Proc. SPIE. 2480, Imaging Spectrometry

KEYWORDS: Spectrographs, Image compression, Spectroscopy, Image resolution, Imaging spectroscopy, Computer simulations, Numerical analysis, Solids, Reconstruction algorithms, Spectroscopes

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Proceedings Article | 12 June 1995 Paper

Ultraviolet-imaging spectroscopy of dust in the interstellar medium

Timothy Cook, Andrew Stephan, Yan Betremieux, Daniel Cotton, Supriya Chakrabarti

Proc. SPIE. 2480, Imaging Spectrometry

KEYWORDS: Spectrographs, Stars, Imaging systems, Sensors, Image processing, Spectroscopy, Image restoration, Image resolution, Imaging spectroscopy, Absorption

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SPIE Journal Paper | 1 December 1993

Gas ionization solar spectral monitor

James Vickers, Daniel Cotton, Timothy Cook, Supriya Chakrabarti

OE Vol. 32 Issue 12

KEYWORDS: Ionization, Electrons, Neon, Sensors, Solar energy, Extreme ultraviolet, Microchannel plates, Calibration, Chemical species, Rockets

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SPIE Journal Paper | 1 December 1993

SPINR: two-dimensional spectral imaging through tomographic reconstruction

Yan Betremieux, Timothy Cook, Daniel Cotton, Supriya Chakrabarti

OE Vol. 32 Issue 12

KEYWORDS: Imaging spectroscopy, Spectroscopy, Tomography, Reconstruction algorithms, Image processing, Magnetosphere, Sensors, Image restoration, Image resolution, Spectral resolution

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Proceedings Article | 7 July 1993 Paper

SPINR: high-resolution two-dimensional spectral imaging

Yan Betremieux, Timothy Cook, Daniel Cotton, Supriya Chakrabarti

Proc. SPIE. 2008, Instrumentation for Magnetospheric Imagery II

KEYWORDS: Spectrographs, Sensors, Image processing, Spectroscopy, Image restoration, Image resolution, Imaging spectroscopy, Image analysis, Spectroscopes, Magnetosphere

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Proceedings Article | 7 July 1993 Paper

Oxygen imager (OXI) for magnetospheric imagery applications

Supriya Chakrabarti, Daniel Cotton, Timothy Cook, G. Gladstone

Proc. SPIE. 2008, Instrumentation for Magnetospheric Imagery II

KEYWORDS: Mirrors, Imaging systems, Sensors, Ions, Coating, Oxygen, Extreme ultraviolet, Airglow, Auroras, Magnetosphere

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Proceedings Article | 7 July 1993 Paper

Single-element imaging spectrograph (SEIS) for magnetospheric imaging

Daniel Cotton, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 2008, Instrumentation for Magnetospheric Imagery II

KEYWORDS: Spectrographs, Imaging systems, Sensors, Reflectivity, Physics, Image resolution, Spectral resolution, Extreme ultraviolet, Spatial resolution, Diffraction gratings

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Proceedings Article | 29 June 1992 Paper

Gas ionization solar spectral monitor

James Vickers, Daniel Cotton, Timothy Cook, Supriya Chakrabarti

Proc. SPIE. 1745, Instrumentation for Planetary and Terrestrial Atmospheric Remote Sensing

KEYWORDS: Rockets, Solar energy, Sensors, Chemical species, Microchannel plates, Electrons, Ionization, Extreme ultraviolet, Helium, Neon

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Showing 5 of 36 publications

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