Ms. Joana Büchler Costa Profile

Joana Büchler Costa

at MPI für Astronomie

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Author

Publications (7)

Proceedings Article | 25 October 2004 Paper

Status report of PYRAMIR: a near-infrared pyramid wavefront sensor for ALFA

Joana Costa, Markus Feldt, Karl Wagner, Peter Bizenberger, Stefan Hippler, Harald Baumeister, Micaela Stumpf, Roberto Ragazzoni, Simone Esposito, Thomas Henning

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551713

KEYWORDS: Wavefront sensors, Sensors, Adaptive optics, Optical design, Telescopes, Deformable mirrors, Infrared radiation, Mirrors, Calibration, Modulation

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Proceedings Article | 25 October 2004 Paper

Wavefront sensing through spatial filters: the case for coronographic, high-contrast AO systems

Markus Feldt, Joana Costa, Micaela Stumpf, Hans-Martin Schmid, Alessandro Berton, Stefan Hippler, Remko Stuik, Jorge Lima

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550883

KEYWORDS: Adaptive optics, Sensors, Wavefronts, Spatial filters, Wavefront sensors, Point spread functions, Calibration, Condition numbers, Actuators, Computer simulations

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Proceedings Article | 25 October 2004 Paper

Testing a nonmodulated pyramid wavefront sensor

Joana Costa, Micaela Stumpf, Markus Feldt

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551772

KEYWORDS: Calibration, Modulation, Condition numbers, Mirrors, Wavefront sensors, Sensors, Adaptive optics, Monochromatic aberrations, Numerical simulations, Interferometers

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Proceedings Article | 3 March 2003 Paper

Can we really go for direct exo-planet detection from the ground?

Markus Feldt, Thomas Henning, Stefan Hippler, Robert Weiss, M. Turatto, Ralph Neuhauser, Artie Hatzes, Hans Schmid, Rens Waters, Elena Puga, Joana Costa

Proceedings Volume 4860, (2003) https://doi.org/10.1117/12.457656

KEYWORDS: Planets, Adaptive optics, Stars, Polarimetry, Photons, Wavefront sensors, Polarization, Actuators, Imaging systems, Sensors

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Proceedings Article | 3 March 2003 Paper

Ground-based coronagraphy: performance of a four-quadrant phase mask

Elena Puga, Markus Feldt, Thomas Henning, Ernst-Bernhard Kley, Joana Costa, Peter Bizenberger, Stefan Hippler

Proceedings Volume 4860, (2003) https://doi.org/10.1117/12.458953

KEYWORDS: Stars, Coronagraphy, Telescopes, Control systems, High dynamic range imaging, Nulling interferometry, Device simulation, Optics manufacturing, Optical components, Adaptive optics

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Proceedings Article | 7 February 2003 Paper

PYRAMIR: a near-infrared pyramid wavefront sensor for the Calar Alto adaptive optics system

Joana Costa, Stefan Hippler, Markus Feldt, Simone Esposito, Roberto Ragazzoni, Peter Bizenberger, Elena Puga, Thomas Henning

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458940

KEYWORDS: Wavefront sensors, Sensors, Adaptive optics, Stars, Control systems, Infrared radiation, Telescopes, Real-time computing, Infrared sensors, Beam splitters

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Proceedings Article | 7 February 2003 Paper

Is there need of any modulation in the pyramid wavefront sensor?

Joana Costa, Roberto Ragazzoni, Adriano Ghedina, Marcel Carbillet, Christophe Verinaud, Markus Feldt, Simone Esposito, Elena Puga, Jacopo Farinato

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459032

KEYWORDS: Modulation, Wavefront sensors, Wavefronts, Adaptive optics, Sensors, Diffraction, Telescopes, Spatial frequencies, Signal to noise ratio, Stars

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Showing 5 of 7 publications

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