SNIK , Frans

Last name: SNIK

First name: Frans

June 9, 2019 (v1)

Conference paper

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Overview of focal plane wavefront sensors to correct for the Low Wind Effect on SUBARU/SCExAO

Vievard, Sébastien Bos, Steven Cassaing, Frédéric

The Low Wind Effect (LWE) refers to a phenomenon that occurs when the wind speed inside a telescope dome drops below 3m/s creating a temperature gradient near the telescope spider. This produces phase discontinuities in the pupil plane that are not detected by traditional Adaptive Optics (AO) systems such as the pyramid wavefront sensor or the...

Uploaded on: December 4, 2022
June 10, 2018 (v1)

Conference paper

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Review of high-contrast imaging systems for current and future ground-based and space-based telescopes: Part II. Common path wavefront sensing/control and coherent differential imaging

Jovanovic, Nemanja Guyon, Olivier N'Diaye, Mamadou

International audience

Uploaded on: December 4, 2022
June 10, 2018 (v1)

Conference paper

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Review of high-contrast imaging systems for current and future ground- and space-based telescopes I: coronagraph design methods and optical performance metrics

Douglas, Ewan Zimmerman, Neil Ruane, Garreth

International audience

Uploaded on: December 4, 2022
June 10, 2018 (v1)

Conference paper

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Review of high-contrast imaging systems for current and future ground-based and space-based telescopes III: technology opportunities and pathways

Snik, Frans Absil, Olivier Baudoz, Pierre

International audience

Uploaded on: December 4, 2022
June 10, 2018 (v1)

Conference paper

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SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologies

Lozi, Julien Guyon, Olivier Jovanovic, Nemanja

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is an extremely modular high-contrast instrument installed on the Subaru telescope in Hawaii. SCExAO has a dual purpose. Its position in the northern hemisphere on a 8-meter telescope makes it a prime instrument for the detection and characterization of exoplanets and stellar...

Uploaded on: December 4, 2022
January 2020 (v1)

Journal article

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Polarimetric imaging mode of VLT/SPHERE/IRDIS

de Boer, Jozua Langlois, Maud van Holstein, Rob

Context. Polarimetric imaging is one of the most effective techniques for high-contrast imaging and for the characterization of protoplanetary disks, and it has the potential of becoming instrumental in the characterization of exoplanets. The Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument installed on the Very Large...

Uploaded on: July 12, 2024
February 27, 2024 (v1)

Conference paper

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Integrated photonic-based coronagraphic systems for future space telescopes

Desai, Niyati König, Lorenzo Por, Emiel

The detection and characterization of Earth-like exoplanets around Sun-like stars is a primary science motivation for the Habitable Worlds Observatory. However, the current best technology is not yet advanced enough to reach the 10−10 contrasts at close angular separations and at the same time remain insensitive to low-order aberrations, as...

Uploaded on: March 3, 2024
February 27, 2024 (v1)

Conference paper

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Visible extreme adaptive optics on extremely large telescopes: towards detecting oxygen in Proxima Centauri b and analogs

Fowler, J. Haffert, Sebastiaan Y. van Kooten, Maaike A. M.

Looking to the future of exo-Earth imaging from the ground, core technology developments are required in visible Extreme Adaptive Optics (ExAO) to enable the observation of atmospheric features such as oxygen on rocky planets in visible light. UNDERGROUND (Ultra-fast AO techNology Determination for Exoplanet imageRs from the GROUND), a...

Uploaded on: March 3, 2024

SNIK , Frans

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