{"title":"Les effets optiques de la turbulence atmosphérique dans les images astronomiques","authors":"D. Bonneau","doi":"10.5802/crphys.101","DOIUrl":null,"url":null,"abstract":". The often blurry appearance of astronomical images at a telescope focus is attributed to atmospheric agitation. The study of the light propagation through the turbulent Earth atmosphere has made it possible to understand the existence of optical turbulence resulting from di ff raction phenomena that accompany the refraction of light rays. Optical turbulence is described by parameters (Fried parameter, isoplanetism angle, coherence time, external scale) which characterize the amplitude and the phase of the wave front on the telescope pupil. We deduce the properties of the images (short or long exposure) formed at the telescope focus as well as the description of the e ff ects of turbulence on these images (scintillation, agitation, spreading) and on interferometric observations (piston e ff ect)","PeriodicalId":50650,"journal":{"name":"Comptes Rendus Physique","volume":" ","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Comptes Rendus Physique","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.5802/crphys.101","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 3
Abstract
. The often blurry appearance of astronomical images at a telescope focus is attributed to atmospheric agitation. The study of the light propagation through the turbulent Earth atmosphere has made it possible to understand the existence of optical turbulence resulting from di ff raction phenomena that accompany the refraction of light rays. Optical turbulence is described by parameters (Fried parameter, isoplanetism angle, coherence time, external scale) which characterize the amplitude and the phase of the wave front on the telescope pupil. We deduce the properties of the images (short or long exposure) formed at the telescope focus as well as the description of the e ff ects of turbulence on these images (scintillation, agitation, spreading) and on interferometric observations (piston e ff ect)
期刊介绍：
The Comptes Rendus - Physique are an open acess and peer-reviewed electronic scientific journal publishing original research article. It is one of seven journals published by the Académie des sciences.
Its objective is to enable researchers to quickly share their work with the international scientific community.
The Comptes Rendus - Physique also publish journal articles, thematic issues and articles on the history of the Académie des sciences and its current scientific activity.
From 2020 onwards, the journal''s policy is based on a diamond open access model: no fees are charged to authors to publish or to readers to access articles. Thus, articles are accessible immediately, free of charge and permanently after publication.
The Comptes Rendus - Physique (8 issues per year) cover all fields of physics and astrophysics and propose dossiers. Thanks to this formula, readers of physics and astrophysics will find, in each issue, the presentation of a subject in particularly rapid development. The authors are chosen from among the most active researchers in the field and each file is coordinated by a guest editor, ensuring that the most recent and significant results are taken into account. In order to preserve the historical purpose of the Comptes Rendus, these issues also leave room for the usual notes and clarifications. The articles are written mainly in English.
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