{"id":16748,"date":"2026-01-29T09:37:31","date_gmt":"2026-01-29T08:37:31","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/?p=16748"},"modified":"2026-01-31T07:14:02","modified_gmt":"2026-01-31T06:14:02","slug":"reglage-dun-etalon-avec-une-source-de-lumiere-h%ce%b1","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/reglage-dun-etalon-avec-une-source-de-lumiere-h%ce%b1\/","title":{"rendered":"R\u00e9glage d&rsquo;un \u00e9talon avec une source de lumi\u00e8re H\u03b1"},"content":{"rendered":"<p>Il s&rsquo;agit d&rsquo;un \u00e9talon \u00e0 air Lunt avec r\u00e9glage par pression.<\/p>\n<p>J&rsquo;esp\u00e8re que la visualisation des gif anim\u00e9s fonctionnera sur le site.<\/p>\n<p>Ici, la pression d&rsquo;un \u00e9talon \u00e0 air est r\u00e9gl\u00e9e de 0 \u00e0 12 PSI, puis ramen\u00e9e \u00e0 son niveau initial.<br \/>\nLe pic central appara\u00eet d&rsquo;abord comme une faible tache diffuse.<br \/>\nIl se r\u00e9tr\u00e9cit ensuite et son intensit\u00e9 augmente lorsque l&rsquo;\u00e9talon s&rsquo;approche de la ligne de coupure Ha.<br \/>\nLa tache centrale se transforme en anneau apr\u00e8s avoir d\u00e9pass\u00e9 la ligne de coupure Ha.<\/p>\n<p><a href=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_01_91_03_PSI11_01_20260104_04xxxx_015fpsLoopForced.gif\" data-lbwps-width=\"1000\" data-lbwps-height=\"756\" data-lbwps-srcsmall=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_01_91_03_PSI11_01_20260104_04xxxx_015fpsLoopForced-300x227.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16773\" src=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_01_91_03_PSI11_01_20260104_04xxxx_015fpsLoopForced-300x227.gif\" alt=\"\" width=\"300\" height=\"227\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Les donn\u00e9es de l&rsquo;anneau de diffraction ont \u00e9t\u00e9 charg\u00e9es dans un programme de traitement de signaux (Fityk).<br \/>\nElles sont repr\u00e9sent\u00e9es ici par une ligne verte.<br \/>\nLa forme th\u00e9orique du pic central au niveau de la bande passante Ha est repr\u00e9sent\u00e9e ici en jaune apr\u00e8s un ajustement des param\u00e8tres.<\/p>\n<p>L&rsquo;animation suivante illustre le r\u00e9sultat pour une pression de r\u00e9glage comprise entre 5 et 7 PSI.<br \/>\nIl faut ignorer la variation du niveau du pic, c&rsquo;est une question de nombre d&rsquo;images additionn\u00e9es.<br \/>\nL&rsquo;information importante est la comparaison de la forme de la mesure avec celle de la courbe th\u00e9orique.<br \/>\nL&rsquo;erreur r\u00e9siduelle du mod\u00e8le de mesure apr\u00e8s ajustement est affich\u00e9e en bas de l&rsquo;animation.<\/p>\n<p><a href=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_11_02_12_11_02_FitCenterPeak_c_fps-02LoopForced.gif\" data-lbwps-width=\"1441\" data-lbwps-height=\"795\" data-lbwps-srcsmall=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_11_02_12_11_02_FitCenterPeak_c_fps-02LoopForced-300x166.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16774\" src=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_11_02_12_11_02_FitCenterPeak_c_fps-02LoopForced-300x166.gif\" alt=\"\" width=\"300\" height=\"166\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Dans les conditions de test, la pression optimale pour obtenir le filtre sur la bande passante se situe entre 6,2 et 6,3 PSI.<br \/>\nC&rsquo;est en tout cas dans cette plage que les param\u00e8tres ajust\u00e9s minimisent l&rsquo;erreur.<\/p>\n<p>Image : mesure \u00e0 6,3 PSI.<\/p>\n<p><a href=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_11_02_11_11_01__11_PSI05.08_Up_0631_20260126_140013_._c.jpg\" data-lbwps-width=\"1438\" data-lbwps-height=\"789\" data-lbwps-srcsmall=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_11_02_11_11_01__11_PSI05.08_Up_0631_20260126_140013_._c-300x165.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16749\" src=\"https:\/\/groupeastronomiespa.be\/astrogas\/wp-content\/uploads\/2026\/01\/20251110_01_11_02_11_11_01__11_PSI05.08_Up_0631_20260126_140013_._c-300x165.jpg\" alt=\"\" width=\"300\" height=\"165\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Alexandre<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;16748&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;8&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;10&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;10&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Veuillez voter&quot;,&quot;legend&quot;:&quot;10\\\/10 - (8 votes)&quot;,&quot;size&quot;:&quot;18&quot;,&quot;title&quot;:&quot;R\u00e9glage d\\u0026#039;un \u00e9talon avec une source de lumi\u00e8re H\u03b1&quot;,&quot;width&quot;:&quot;227.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"6\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"7\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"8\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"9\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"10\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 227.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 18px; height: 18px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 14.4px;\">\n            10\/10 - (8 votes)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Il s&rsquo;agit d&rsquo;un \u00e9talon \u00e0 air Lunt avec r\u00e9glage par pression. J&rsquo;esp\u00e8re que la visualisation des gif anim\u00e9s fonctionnera sur le site. Ici, la pression d&rsquo;un \u00e9talon \u00e0 air est r\u00e9gl\u00e9e de 0 \u00e0 12 PSI, puis ramen\u00e9e \u00e0 son niveau initial. Le pic central appara\u00eet d&rsquo;abord comme une faible tache diffuse. Il se r\u00e9tr\u00e9cit [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-16748","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/16748","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=16748"}],"version-history":[{"count":4,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/16748\/revisions"}],"predecessor-version":[{"id":16775,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/16748\/revisions\/16775"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=16748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=16748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=16748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}