Relevant bibliographies by topics / Lyot coronagraph

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Lyot coronagraph'

Author: Grafiati
Published: 7 July 2024
Last updated: 31 July 2025

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Journal articles on the topic "Lyot coronagraph"

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Leboulleux, Lucie, Alexis Carlotti, and Mamadou N’Diaye. "Redundant apodization for direct imaging of exoplanets." Astronomy & Astrophysics 659 (March 2022): A143. http://dx.doi.org/10.1051/0004-6361/202142410.

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Context. Direct imaging and spectroscopy of Earth-like planets and young Jupiters require contrast values up to 106−1010 at angular separations of a few dozen milliarcseconds. To achieve this goal, one of the most promising approaches consists of using large segmented primary mirror telescopes with coronagraphic instruments. While they are able to reach high contrast at small angular separations, coronagraphs are highly sensitive to wavefront errors, however. The segmentation itself is responsible for phasing errors and segment-level vibrations that have to be controlled at a subnanometric acc
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Kim, I. S., and O. I. Bugaenko. "On magnetic measurements in prominences." Proceedings of the International Astronomical Union 8, S300 (2013): 426–27. http://dx.doi.org/10.1017/s1743921313011393.

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AbstractThe successes of magnetic measurements in faint objects located near very bright ones are strongly depending on the stray light in the telescope. We propose a mask with a variable transmission placed on the primary optics of a telescope. Our computations of the stray light in such a telescope indicate that the calculated coronagraphic factor of improvement, K, would increase at least by 2 orders of magnitude compared to the Lyot-type coronagraph.
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Anche, Ramya M., Ewan Douglas, Kian Milani, et al. "Simulation of High-contrast Polarimetric Observations of Debris Disks with the Roman Coronagraph Instrument." Publications of the Astronomical Society of the Pacific 135, no. 1054 (2023): 125001. http://dx.doi.org/10.1088/1538-3873/ad0a72.

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Abstract The Nancy Grace Roman Space Telescope Coronagraph Instrument will enable the polarimetric imaging of debris disks and inner dust belts in the optical and near-infrared wavelengths, in addition to the high-contrast polarimetric imaging and spectroscopy of exoplanets. The Coronagraph uses two Wollaston prisms to produce four orthogonally polarized images and is expected to measure the polarization fraction with measurement errors <3% per spatial resolution element. To simulate the polarization observations through the Hybrid Lyot Coronagraph (HLC) and Shaped Pupil Coronagraph (SPC),
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Rougeot, R., R. Flamary, D. Mary, and C. Aime. "Influence of surface roughness on diffraction in the externally occulted Lyot solar coronagraph." Astronomy & Astrophysics 626 (June 2019): A1. http://dx.doi.org/10.1051/0004-6361/201834634.

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Context. The solar coronagraph ASPIICS will fly on the future ESA formation flying mission Proba-3. The instrument combines an external occulter of diameter 1.42 m and a Lyot solar coronagraph of 5 cm diameter, located downstream at a distance of 144 m. Aims. The theoretical performance of the externally occulted Lyot coronagraph has been computed by assuming perfect optics. In this paper, we improve related modelling by introducing roughness scattering effects from the telescope. We have computed the diffraction at the detector, that we compare to the ideal case without perturbation to estima
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Carbillet, Marcel, Philippe Bendjoya, Lyu Abe, et al. "Apodized Lyot coronagraph for SPHERE/VLT." Experimental Astronomy 30, no. 1 (2011): 39–58. http://dx.doi.org/10.1007/s10686-011-9219-4.

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Leboulleux, Lucie, Jean-François Sauvage, Rémi Soummer, et al. "Experimental validation of coronagraphic focal-plane wavefront sensing for future segmented space telescopes." Astronomy & Astrophysics 639 (July 2020): A70. http://dx.doi.org/10.1051/0004-6361/202037658.

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Context. Direct imaging of Earth-like planets from space requires dedicated observatories, combining large segmented apertures with instruments and techniques such as coronagraphs, wavefront sensors, and wavefront control in order to reach the high contrast of 1010 that is required. The complexity of these systems would be increased by the segmentation of the primary mirror, which allows for the larger diameters necessary to image Earth-like planets but also introduces specific patterns in the image due to the pupil shape and segmentation and making high-contrast imaging more challenging. Amon
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Trauger, John, Dwight Moody, John Krist, and Brian Gordon. "Hybrid Lyot coronagraph for WFIRST-AFTA: coronagraph design and performance metrics." Journal of Astronomical Telescopes, Instruments, and Systems 2, no. 1 (2016): 011013. http://dx.doi.org/10.1117/1.jatis.2.1.011013.

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Soummer, R., L. Pueyo, A. Sivaramakrishnan, and R. J. Vanderbei. "Fast computation of Lyot-style coronagraph propagation." Optics Express 15, no. 24 (2007): 15935. http://dx.doi.org/10.1364/oe.15.015935.

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Loutsenko, Igor, and Oksana Yermolayeva. "Quasi-Band-Limited Coronagraph for Extended Sources." Journal of Astronomical Instrumentation 10, no. 01 (2021): 2150002. http://dx.doi.org/10.1142/s2251171721500021.

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We propose a class of graded coronagraphic “amplitude” image masks for a high throughput Lyot-type coronagraph that transmits light from an annular region around an extended source and suppresses light, with extremely high ratio, from elsewhere. The interior radius of the region is comparable with its exterior radius. The masks are designed using an idea inspired by approach due M. J. Kuchner and W. A. Traub (“band-limited” masks) and approach to optimal apodization by D. Slepian. One potential application of our masks is direct high-resolution imaging of exo-planets with the help of the Solar
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Xin, Yinzi, Laurent Pueyo, Romain Laugier, et al. "Coronagraphic Data Post-processing Using Projections on Instrumental Modes." Astrophysical Journal 963, no. 2 (2024): 96. http://dx.doi.org/10.3847/1538-4357/ad1879.

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Abstract Directly observing exoplanets with coronagraphs is impeded by the presence of speckles from aberrations in the optical path, which can be mitigated in hardware with wave front control, as well as in post-processing. This work explores using an instrument model in post-processing to separate astrophysical signals from residual aberrations in coronagraphic data. The effect of wave front error (WFE) on the coronagraphic intensity consists of a linear contribution and a quadratic contribution. When either of the terms is much larger than the other, the instrument response can be approxima
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Dissertations / Theses on the topic "Lyot coronagraph"

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Alagao, Mary Angelie. "Characterization and optimization of the Evanescent Wave Coronagraph." Electronic Thesis or Diss., Saint-Etienne, 2023. http://www.theses.fr/2023STET0060.

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L’imagerie directe des exoplanètes reste difficile en raison du contraste élevé et de la faible séparation angulaire entre l'étoile et la planète. Cela nécessite de supprimer l'éblouissement dû à l'étoile et de s'assurer que la lumière faible de la planète n'est pas noyée au milieu de divers bruits. La détection dépend de la maturité des techniques et des algorithmes utilisés, tout en tenant compte des compromis importants sur le contraste brut, la résolution angulaire et la transmission. L'une de ses composantes clés est l'utilisation de coronagraphes - des instruments ayant pour seul but de
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Venet, Melanie. "Coronographes spatiaux : Solar Orbiter / Metis, Smese / Lyot, Proba-3 / Aspiics." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10011.

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La couronne solaire est la partie de l'atmosphère du Soleil qui s'étend de la photosphère (surface solaire d'où sont émis les photons) jusque dans le milieu interplanétaire. Sa compréhension relève d'un enjeu majeur car elle est à l'origine de phénomènes qui peuvent perturber les télécommunications, les êtres vivants et même le climat. L'instrument privilégié pour l'observer est le coronographe, système optique occultant le disque solaire au profit de la couronne, un million de fois moins intense. Ma thèse porte sur son étude, en particulier à travers les projets spatiaux :- SOLAR ORBITER, qui
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Book chapters on the topic "Lyot coronagraph"

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Boccaletti, Anthony, Jean-Charles Augereau, Gaël Chauvin, et al. "Lyot Coronagraphy at the Palomar and Phase-Mask Coronagraphy at the VLT." In Science with Adaptive Optics. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/10828557_4.

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Conference papers on the topic "Lyot coronagraph"

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Soummer, Rémi, Raphaël Pourcelot, Emiel Por, et al. "High-contrast imager for complex aperture telescopes (HiCAT): 11. System-level demonstration of the apodized pupil Lyot coronagraph with a segmented aperture in air." In Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave, edited by Laura E. Coyle, Marshall D. Perrin, and Shuji Matsuura. SPIE, 2024. http://dx.doi.org/10.1117/12.3018037.

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Watson, Steven M., and James P. Mills. "Incorporating coronographs with segmented telescopic systems for extrasolar planetary imaging." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.wv2.

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Detection of nonsolar planets is a challenging problem. Due to the planets' faintness relative to the star, it is necessary to suppress the stellar diffracted energy to very low levels. In addition, the planets' proximity to the star requires large diameter optics. This research examines various multiaperture and segmented telescopic systems incorporating Lyot coronagraphs to suppress the stellar diffracted energy and provide the required resolution so that the extrasolar planets can be directly imaged. Because of the phasing tolerances and required contrast ratios, the IR band of 10.5-13.5 µm
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Ftaclas, Christ, Edward T. Siebert, and Richard J. Terrile. "A High Efficiency Coronagraph for Astronomical Applications." In Space Optics for Astrophysics and Earth and Planetary Remote Sensing. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/soa.1988.wa5.

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Direct detection of extra-solar planetary systems is one of a class of astronomical problems requiring a significant reduction of diffracted light within a few arcseconds of a bright point source. Traditional approaches to diffraction reduction control have included pupil plane apodization, which extracts enormous penalties in effective collecting area to obtain small angle performance, and coronagraphs, in which high efficiency requires extensive occultation of the central source giving up a valuable portion of the field of view. We have developed a hybrid, high efficiency, coronagraph which
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Smartt, Raymond N., Serge Koutchmy, and Eugene W. Cross. "Prototype reflecting coronagraph." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.wv1.

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A miniature 1-m focal length coronagraph has been constructed at NSO/SP, based on a 5-cm diam superpolished silicon mirror from Zeiss, F.R.G. The optical configuration is simply off-axis reflection from the objective to an occulting disk, Lyot stop, and secondary optics. The coronagraph has been designed to be used either with photographic recording or a video CCD camera, both in combination with a VARO image tube. Details of the design and preliminary results are presented. It is shown that a mirror-objective-based coronagraph has many advantages and few disadvantages compared with the tradit
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Trauger, John, Brian Gordon, John Krist, and Dwight Moody. "Hybrid Lyot coronagraph for WFIRST-AFTA: coronagraph design and performance metrics." In SPIE Optical Engineering + Applications, edited by Stuart Shaklan. SPIE, 2015. http://dx.doi.org/10.1117/12.2190625.

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Socker, Dennis G., Guenter E. Brueckner, Clarence M. Korendyke, et al. "LASCO spectrometric Lyot coronagraph tunable passband filter." In SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, edited by David M. Rust. SPIE, 1996. http://dx.doi.org/10.1117/12.259711.

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Vigan, A., M. N'Diaye, and K. Dohlen. "Stop-less Lyot coronagraph for exoplanet characterization." In SPIE Astronomical Telescopes + Instrumentation, edited by Ian S. McLean, Suzanne K. Ramsay, and Hideki Takami. SPIE, 2012. http://dx.doi.org/10.1117/12.925294.

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Vial, Jean-Claude, Xueyan Song, Philippe Lemaire, et al. "The solar high-resolution imager - coronagraph LYOT mission." In Astronomical Telescopes and Instrumentation, edited by Stephen L. Keil and Sergey V. Avakyan. SPIE, 2003. http://dx.doi.org/10.1117/12.460291.

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Lucas, Miles, Michael Bottom, Olivier Guyon, et al. "A visible-light Lyot coronagraph for SCExAO/VAMPIRES." In Ground-based and Airborne Instrumentation for Astronomy IX, edited by Christopher J. Evans, Julia J. Bryant, and Kentaro Motohara. SPIE, 2022. http://dx.doi.org/10.1117/12.2632269.

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Breckinridge, J. B., and R. A. Chipman. "Telescope polarization and image quality: Lyot coronagraph performance." In SPIE Astronomical Telescopes + Instrumentation, edited by Howard A. MacEwen, Giovanni G. Fazio, Makenzie Lystrup, Natalie Batalha, Nicholas Siegler, and Edward C. Tong. SPIE, 2016. http://dx.doi.org/10.1117/12.2231242.

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