Dr. Kuravi Hewawasam Profile

Dr. Kuravi Hewawasam

Postdoctoral Research Associate at Univ of Massachusetts Lowell

SPIE Involvement:

Author

Publications (18)

Proceedings Article | 5 October 2023 Presentation + Paper

The PICTURE-C exoplanetary imaging balloon mission: second flight results and the transition to a new mission, PICTURE-D

Christopher Mendillo, Kuravi Hewawasam, Thaddeus Potter, Jason Martel, Supriya Chakrabarti, Timothy Cook, Sunip Mukherjee, Frans Snik, David Doelman, Dan Sirbu, Ruslan Belikov, Eduardo Bendek, Karl Stapelfeldt, Schuyler Grace Wolff

Proceedings Volume 12680, 126800F (2023) https://doi.org/10.1117/12.2677518

KEYWORDS: Coronagraphy, Wavefronts, Polarization, Cameras, Balloons, Telescopes, Control systems, Stars, Imaging systems, Scattered light

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Proceedings Article | 4 October 2023 Paper

The PICTURE-C exoplanetary imaging balloon mission: a refactored thermal model and framework for an end-to-end model for balloon borne coronagraphs

Thaddeus Potter, Christopher Mendillo, Kuravi Hewawasam, Supriya Chakrabarti, Jason Martel, Timothy Cook

Proceedings Volume 12676, 126760V (2023) https://doi.org/10.1117/12.2677591

KEYWORDS: Thermal modeling, Data modeling, Coronagraphy, Balloons, Mirrors, Optical benches, Observatories, Telescopes, Boundary conditions

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SPIE Journal Paper | 24 May 2023 Open Access

Balloon flight demonstration of coronagraph focal plane wavefront correction with PICTURE-C

Christopher B. Mendillo, Kuravi Hewawasam, Jason Martel, Thaddeus Potter, Timothy A. Cook, Supriya Chakrabarti

JATIS, Vol. 9, Issue 02, 025005, (May 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.2.025005

KEYWORDS: Coronagraphy, Telescopes, Wavefronts, Stars, Balloons, Control systems, Cameras, Equipment, Vibration, Mirrors

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Proceedings Article | 27 August 2022 Presentation + Paper

The PICTURE-C exoplanetary imaging balloon mission: laboratory coronagraph demonstrations of high-contrast imaging and low-order wavefront control

Christopher Mendillo, Kuravi Hewawasam, Thaddeus Potter, Jason Martel, Timothy Cook, Supriya Chakrabarti

Proceedings Volume 12180, 1218022 (2022) https://doi.org/10.1117/12.2630237

KEYWORDS: Coronagraphy, Wavefronts, Speckle, Sensors, Mirrors, Telescopes, Control systems, Cameras, Distortion, Actuators

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Proceedings Article | 27 August 2022 Poster + Paper

STOP model implementation for the PICTURE-C exoplanetary imaging balloon mission, progress report I: thermal modeling and comparison with flight data

Christopher Mendillo, Jason Martel, Timothy Cook, Supriya Chakrabarti, Thaddeus Potter, Kuravi Hewawasam

Proceedings Volume 12180, 1218057 (2022) https://doi.org/10.1117/12.2630418

KEYWORDS: Mirrors, Thermal modeling, Data modeling, Temperature sensors, Optical benches, Observatories, Electronics, Solar radiation models, Solids, Coronagraphy

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Proceedings Article | 1 September 2021 Poster + Presentation + Paper

Dual-polarization electric field conjugation and applications for vector vortex coronagraphs

Christopher Mendillo, Frans Snik, Kuravi Hewawasam, Jason Martel, Timothy Cook, Supriya Chakrabarti, David Doelman

Proceedings Volume 11823, 118231T (2021) https://doi.org/10.1117/12.2594775

KEYWORDS: Polarization, Coronagraphy, Actuators, Polarimetry, Deformable mirrors, Modulation, Exoplanets, Cameras, Imaging systems, Adaptive optics

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Proceedings Article | 1 September 2021 Presentation + Paper

The PICTURE-C exoplanetary imaging balloon mission: first flight results and second flight preparation

Christopher Mendillo, Kuravi Hewawasam, Jason Martel, Thaddeus Potter, Timothy Cook, Supriya Chakrabarti

Proceedings Volume 11823, 118230X (2021) https://doi.org/10.1117/12.2594749

KEYWORDS: Telescopes, Coronagraphy, Cameras, Mirrors, Wavefronts, Fourier transforms, Imaging systems, CCD cameras, Sensors, Exoplanets

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Proceedings Article | 13 December 2020 Poster + Paper

The PICTURE-C MKID camera

Supriya Chakrabarti, Sarah Steiger, Neelay Fruitwala, Isabel Lipartito, Nicholas Zobrist, Noah Swimmer, Benjamin Mazin, Clint Bockstiegel, Kristina Davis, John Bailey, Jennifer Smith, Timothy Cook, Christopher Mendillo, Jason Martel, Kuravi Hewawasam, Gregoire Coiffard, Miguel Daal

Proceedings Volume 11447, 114479B (2020) https://doi.org/10.1117/12.2561770

KEYWORDS: Cameras, Exoplanets, Iterated function systems, Optical imaging, Sensors, Photon counting, Spectrographs, Microwave radiation, Inductance, Spatial resolution

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Proceedings Article | 9 September 2019 Paper

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

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

Proceedings Volume 11117, 111171Q (2019) https://doi.org/10.1117/12.2529706

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

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

Proceedings Volume 11117, 111171R (2019) https://doi.org/10.1117/12.2529724

KEYWORDS: Calibration, Coronagraphy, Wavefront sensors, Wavefronts, Sensors, Control systems, Deformable mirrors, Cameras, 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, Glenn Howe, Kuravi Hewawasam, Jason Martel, Timothy Cook, Supriya Chakrabarti

Proceedings Volume 11117, 1111707 (2019) https://doi.org/10.1117/12.2529710

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

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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, 025003, (May 2019) https://doi.org/10.1117/12.10.1117/1.JATIS.5.2.025003

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

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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

Proceedings Volume 10400, 1040010 (2017) https://doi.org/10.1117/12.2274105

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

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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, Supriya Chakrabarti, Timothy Cook, Jason Martel, Susanna Finn

Proceedings Volume 10400, 104001Z (2017) https://doi.org/10.1117/12.2274122

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

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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, Supriya Chakrabarti, Timothy Cook, Jason Martel, Susanna Finn

Proceedings Volume 10400, 1040020 (2017) https://doi.org/10.1117/12.2274125

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

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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

JARS, Vol. 9, Issue 01, 095979, (December 2015) https://doi.org/10.1117/12.10.1117/1.JRS.9.095979

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

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

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

Proceedings Volume 9605, 96051A (2015) https://doi.org/10.1117/12.2187262

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

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Proceedings Article | 16 September 2015 Paper

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

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

Proceedings Volume 9605, 960519 (2015) https://doi.org/10.1117/12.2188238

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

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Showing 5 of 18 publications

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