{"id":488,"date":"2011-04-03T09:54:57","date_gmt":"2011-04-03T09:54:57","guid":{"rendered":"http:\/\/coherencetomography.com\/novacam.com\/?page_id=488"},"modified":"2021-04-09T13:46:05","modified_gmt":"2021-04-09T17:46:05","slug":"how-lci-works","status":"publish","type":"page","link":"https:\/\/www.novacam.com\/fr\/technologie\/comment-fonctionne-le-lci\/","title":{"rendered":"Fonctionnement de l'ICM"},"content":{"rendered":"<section  class='av_textblock_section av-5afoe0-e05c462aad9a08fcf22734f5fb03c44f'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1>Fonctionnement de l'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence (IFC)<\/h1>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4znu74-d85ffa123ce6741f90e3393dd9272967\">\n.flex_column.av-4znu74-d85ffa123ce6741f90e3393dd9272967{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\nbackground-color:#d7f4f4;\n}\n<\/style>\n<div  class='flex_column av-4znu74-d85ffa123ce6741f90e3393dd9272967 av_one_full  avia-builder-el-1  el_after_av_textblock  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-4w8gu8-bf1238988bf6c7101fab03e5f63b8981'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock ncmiddle'  itemprop=\"text\" ><h2>Principes de l'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence<\/h2>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4pmqyw-7c0b092f023bafb2bd72c9ca0d14dced\">\n.flex_column.av-4pmqyw-7c0b092f023bafb2bd72c9ca0d14dced{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-4pmqyw-7c0b092f023bafb2bd72c9ca0d14dced av_one_half  avia-builder-el-3  el_after_av_one_full  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-ggimg-6fd9750b73dbcd45a92b14207ba9f69f'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>L'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence (LCI) est une technique d'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence.<strong> technologie de d\u00e9tection optique sans contact<\/strong>.<\/p>\n<p><strong>Une sonde optique dirige un faisceau de lumi\u00e8re \u00e0 faible coh\u00e9rence<\/strong> <strong>\u00e0 la surface d'un \u00e9chantillon et envoie les signaux lumineux r\u00e9fl\u00e9chis \u00e0 un d\u00e9tecteur interf\u00e9rom\u00e9trique (interf\u00e9rom\u00e8tre) via une fibre optique pour interpr\u00e9tation.\u00a0<\/strong>Lorsque, comme dans le diagramme, l'\u00e9chantillon mesur\u00e9 est constitu\u00e9 d'un empilement de couches de mat\u00e9riaux semi-transparents, les r\u00e9flexions de la lumi\u00e8re sont re\u00e7ues simultan\u00e9ment par le haut et le bas de chaque couche.<\/p>\n<p><strong>L'interf\u00e9rom\u00e8tre interpr\u00e8te les donn\u00e9es optiques r\u00e9fl\u00e9chies de chaque point de balayage.<\/strong> sous la forme d'une figure d'interf\u00e9rence et l'enregistre sous la forme d'un profil de profondeur (balayage A). Une coupe transversale (balayage B) est obtenue en d\u00e9pla\u00e7ant la sonde de mani\u00e8re lin\u00e9aire sur l'\u00e9chantillon. Une image volum\u00e9trique en 3D est g\u00e9n\u00e9r\u00e9e en combinant plusieurs coupes transversales.<\/p>\n<p><strong>Notez que le balayage est colin\u00e9aire :<\/strong> les signaux lumineux \u00e9mis et r\u00e9fl\u00e9chis se d\u00e9placent le long du m\u00eame axe, ce qui permet de mesurer des surfaces pr\u00e9sentant des ar\u00eates vives, des canaux, etc.<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4divm0-7e8e95c3b1eca3074fc81ccebe331338\">\n.flex_column.av-4divm0-7e8e95c3b1eca3074fc81ccebe331338{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-4divm0-7e8e95c3b1eca3074fc81ccebe331338 av_two_fifth  avia-builder-el-5  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-48ass0-0b08f5668df97747c46aee7c3a57a4f5\">\n.avia-image-container.av-48ass0-0b08f5668df97747c46aee7c3a57a4f5 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-48ass0-0b08f5668df97747c46aee7c3a57a4f5 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-48ass0-0b08f5668df97747c46aee7c3a57a4f5 av-styling- av-img-linked avia-align-center  avia-builder-el-6  el_before_av_textblock  avia-builder-el-first'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/multilayer-film-scan.jpg\" data-srcset=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/multilayer-film-scan.jpg 274w, https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/multilayer-film-scan-140x134.jpg 140w\" data-sizes=\"(max-width: 274px) 100vw, 274px\" class='avia_image'  aria-label='Mesure de couches de mat\u00e9riaux semi-transparents \u00e0 l&#039;aide d&#039;un interf\u00e9rom\u00e8tre \u00e0 faible coh\u00e9rence'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-2902 avia-img-lazy-loading-not-2902 avia_image' src=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/multilayer-film-scan.jpg\" alt='Mesure des couches de mat\u00e9riaux semi-transparents' title='Mesure de couches de mat\u00e9riaux semi-transparents \u00e0 l&#039;aide d&#039;un interf\u00e9rom\u00e8tre \u00e0 faible coh\u00e9rence'  height=\"262\" width=\"274\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/multilayer-film-scan.jpg 274w, https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/multilayer-film-scan-140x134.jpg 140w\" sizes=\"(max-width: 274px) 100vw, 274px\" \/><\/a><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-42yzoo-6188e206e6f934d284f0d9ed052713b0'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><small>Un faisceau de lumi\u00e8re \u00e0 faible coh\u00e9rence \u00e9mis par une sonde optique traverse un film multicouche. Remarque : la lumi\u00e8re \u00e9mise et la lumi\u00e8re r\u00e9fl\u00e9chie se d\u00e9placent en fait le long du m\u00eame axe (balayage colin\u00e9aire).<\/small><\/p>\n<\/div><\/section><\/p><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mi8l4-1c0de15e6bfe1ea8fdf3b94bc672bb69\">\n#top .hr.hr-invisible.av-mi8l4-1c0de15e6bfe1ea8fdf3b94bc672bb69{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-mi8l4-1c0de15e6bfe1ea8fdf3b94bc672bb69 hr-invisible  avia-builder-el-8  el_after_av_two_fifth  el_before_av_one_full'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-3wgoi0-00a8d6ce1bc417d7b31a4bffb22921bf\">\n.flex_column.av-3wgoi0-00a8d6ce1bc417d7b31a4bffb22921bf{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\nbackground-color:#d7f4f4;\n}\n<\/style>\n<div  class='flex_column av-3wgoi0-00a8d6ce1bc417d7b31a4bffb22921bf av_one_full  avia-builder-el-9  el_after_av_hr  el_before_av_one_full  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-3oe7pk-4cad9b7eb03a8c480da3a28eaf75fc4c'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock ncmiddle'  itemprop=\"text\" ><h2>Fonctionnement d'un interf\u00e9rom\u00e8tre \u00e0 faible coh\u00e9rence<\/h2>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-3kivi8-2a5ec5b231c7b5d1de5404f81b76a537\">\n.flex_column.av-3kivi8-2a5ec5b231c7b5d1de5404f81b76a537{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-3kivi8-2a5ec5b231c7b5d1de5404f81b76a537 av_one_full  avia-builder-el-11  el_after_av_one_full  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-3dgl6o-27dc8a6127403c101f5f99a9eaaec5b1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Comme indiqu\u00e9 ci-dessus, l'interf\u00e9rom\u00e8tre analyse la lumi\u00e8re r\u00e9fl\u00e9chie par l'\u00e9chantillon vers la sonde optique.<\/p>\n<p><strong>Deux principaux types d'interf\u00e9rom\u00e8tres \u00e0 faible coh\u00e9rence<\/strong> - dans le domaine temporel (TD) et dans le domaine fr\u00e9quentiel en utilisant la source balay\u00e9e - diff\u00e8rent par la source de leur lumi\u00e8re et par les d\u00e9tails de leur mise en \u0153uvre.<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-34lfzk-0a969e1163ffbbf5d82ab6cafa218d39\">\n.flex_column.av-34lfzk-0a969e1163ffbbf5d82ab6cafa218d39{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-34lfzk-0a969e1163ffbbf5d82ab6cafa218d39 av_one_half  avia-builder-el-13  el_after_av_one_full  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-2xlblk-b17d46bb0a72080233ed560b2d7977d8'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Interf\u00e9rom\u00e8tres dans le domaine temporel (TD)<\/strong> utilisent la lumi\u00e8re \u00e0 faible coh\u00e9rence d'une diode super-luminescente. La lumi\u00e8re est introduite dans un coupleur \u00e0 fibre optique qui divise le faisceau lumineux en deux bras (chemins), l'un dirig\u00e9 vers la surface de l'\u00e9chantillon, l'autre vers un miroir de r\u00e9f\u00e9rence \u00e0 balayage. Le d\u00e9tecteur capture ensuite l'interf\u00e9rence des rayons lumineux r\u00e9fl\u00e9chis par ces deux bras. L'interf\u00e9rence constructive est observ\u00e9e sous la forme d'un maximum d'intensit\u00e9 lorsque les chemins optiques des deux bras sont exactement \u00e9gaux. En balayant la longueur du bras de r\u00e9f\u00e9rence pour faire appara\u00eetre le signal d'interf\u00e9rence, le d\u00e9tecteur d\u00e9termine la position pr\u00e9cise du point de r\u00e9flexion dans l'\u00e9chantillon.<\/p>\n<p><strong>Interf\u00e9rom\u00e8tres \u00e0 domaine de fr\u00e9quence avec source balay\u00e9e<\/strong>\u00a0<strong>(SS)<\/strong> utiliser la lumi\u00e8re d'une source laser \u00e0 balayage rapide au lieu d'une diode super-luminescente. Le miroir de r\u00e9f\u00e9rence est fixe. Le d\u00e9tecteur capture le spectre de la figure d'interf\u00e9rence dans le temps et convertit ensuite ce spectre dans le domaine temporel \u00e0 l'aide de la transformation de Fourier.<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2sq4i0-5c7487982499a3da80bb5d3af486fb12\">\n.flex_column.av-2sq4i0-5c7487982499a3da80bb5d3af486fb12{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-2sq4i0-5c7487982499a3da80bb5d3af486fb12 av_two_fifth  avia-builder-el-15  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2jx58g-e5dd8c4707b78a0a0136a0017ae9ea41\">\n.avia-image-container.av-2jx58g-e5dd8c4707b78a0a0136a0017ae9ea41 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-2jx58g-e5dd8c4707b78a0a0136a0017ae9ea41 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-2jx58g-e5dd8c4707b78a0a0136a0017ae9ea41 av-styling- av-img-linked avia-align-center  avia-builder-el-16  el_before_av_textblock  avia-builder-el-first'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram.jpg\" data-srcset=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram.jpg 348w, https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram-140x80.jpg 140w, https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram-300x171.jpg 300w\" data-sizes=\"(max-width: 348px) 100vw, 348px\" class='avia_image'  aria-label='Diagramme d&#039;interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-2903 avia-img-lazy-loading-not-2903 avia_image' src=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram.jpg\" alt='Diagramme d&#039;interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence' title='Diagramme d&#039;interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence'  height=\"198\" width=\"348\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram.jpg 348w, https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram-140x80.jpg 140w, https:\/\/www.novacam.com\/wp-content\/uploads\/2011\/08\/low-coherence-interferometry-diagram-300x171.jpg 300w\" sizes=\"(max-width: 348px) 100vw, 348px\" \/><\/a><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-2gkkyg-7ebfa230d057e9ddb6d9556e1f02047b'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><small>L'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence dans le domaine temporel utilise un miroir de r\u00e9f\u00e9rence \u00e0 balayage<\/small><\/p>\n<\/div><\/section><\/p><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mi8l4-fc682bdcd3a9ab3859e8d00ebf36fac4\">\n#top .hr.hr-invisible.av-mi8l4-fc682bdcd3a9ab3859e8d00ebf36fac4{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-mi8l4-fc682bdcd3a9ab3859e8d00ebf36fac4 hr-invisible  avia-builder-el-18  el_after_av_two_fifth  el_before_av_one_full'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-89f60-e7b41b791feb7d724f5a7799a0d94c10\">\n.flex_column.av-89f60-e7b41b791feb7d724f5a7799a0d94c10{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\nbackground-color:#d7f4f4;\n}\n<\/style>\n<div  class='flex_column av-89f60-e7b41b791feb7d724f5a7799a0d94c10 av_one_full  avia-builder-el-19  el_after_av_hr  el_before_av_one_half  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-22bia0-c23b297415bf615ada8b4f602c71cfae'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock ncmiddle'  itemprop=\"text\" ><h2>Comparaison des interf\u00e9rom\u00e8tres dans le domaine temporel et dans le domaine fr\u00e9quentiel (avec source balay\u00e9e)<\/h2>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1wq9og-445ed96411dd12de3de6c9c82a22f42b\">\n.flex_column.av-1wq9og-445ed96411dd12de3de6c9c82a22f42b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1wq9og-445ed96411dd12de3de6c9c82a22f42b av_one_half  avia-builder-el-21  el_after_av_one_full  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-1t9tqo-f17fb030df84619af88e53217c3fdf31'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Interf\u00e9rom\u00e8tres LC dans le domaine temporel<\/strong><\/p>\n<ul>\n<li>effectuer un balayage \u00e0 une vitesse atteignant quelques kHz<\/li>\n<li>sont tr\u00e8s robustes et insensibles \u00e0 la saturation car les franges interf\u00e9rom\u00e9triques sont cod\u00e9es en fr\u00e9quence<\/li>\n<li>maintenir la sensibilit\u00e9 quelle que soit la profondeur de balayage<\/li>\n<\/ul>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1wq9og-853d2c4a47bb2c87c111d69170be099b\">\n.flex_column.av-1wq9og-853d2c4a47bb2c87c111d69170be099b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1wq9og-853d2c4a47bb2c87c111d69170be099b av_one_half  avia-builder-el-23  el_after_av_one_half  el_before_av_one_fourth  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-1t9tqo-f17fb030df84619af88e53217c3fdf31'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Interf\u00e9rom\u00e8tres LC \u00e0 domaine de fr\u00e9quence<\/strong> avec source balay\u00e9e<\/p>\n<ul>\n<li>fonctionner \u00e0 des vitesses de balayage \u00e9lev\u00e9es et tr\u00e8s \u00e9lev\u00e9es (20 kHz et plus)<\/li>\n<li>maintenir la sensibilit\u00e9 \u00e0 des vitesses plus \u00e9lev\u00e9es<\/li>\n<li>perte de sensibilit\u00e9 avec l'augmentation de la profondeur de balayage<\/li>\n<\/ul>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-j72go-6dd965b6709818a6a1ca3df593efb05b\">\n.flex_column.av-j72go-6dd965b6709818a6a1ca3df593efb05b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-j72go-6dd965b6709818a6a1ca3df593efb05b av_one_fourth  avia-builder-el-25  el_after_av_one_half  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-dvqcg-4ca715db02269e75f9a1791040bc3330\">\n.flex_column.av-dvqcg-4ca715db02269e75f9a1791040bc3330{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-dvqcg-4ca715db02269e75f9a1791040bc3330 av_one_half  avia-builder-el-26  el_after_av_one_fourth  el_before_av_one_fourth  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-1t9tqo-f17fb030df84619af88e53217c3fdf31'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Les deux types d'interf\u00e9rom\u00e8tres LC<\/strong><\/p>\n<ul>\n<li>sont insensibles aux perturbations de l'air et \u00e0 la coupure du faisceau<\/li>\n<li>connaissent la distance absolue de la surface de l'\u00e9chantillon lorsqu'ils sont allum\u00e9s, sans qu'il soit n\u00e9cessaire de compter les franges (contrairement aux interf\u00e9rom\u00e8tres qui utilisent des sources de lumi\u00e8re laser coh\u00e9rentes)<\/li>\n<\/ul>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-apvkw-e986d13f026090ca628d3bb34223c77b\">\n.flex_column.av-apvkw-e986d13f026090ca628d3bb34223c77b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-apvkw-e986d13f026090ca628d3bb34223c77b av_one_fourth  avia-builder-el-28  el_after_av_one_half  el_before_av_one_full  flex_column_div av-zero-column-padding  column-top-margin'     ><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1wq9og-445ed96411dd12de3de6c9c82a22f42b\">\n.flex_column.av-1wq9og-445ed96411dd12de3de6c9c82a22f42b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1wq9og-445ed96411dd12de3de6c9c82a22f42b av_one_full  avia-builder-el-29  el_after_av_one_fourth  el_before_av_hr  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-1t9tqo-f66a1bcb44e12b9fb36ae4a62d263438'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Novacam fabrique des interf\u00e9rom\u00e8tres dans le domaine temporel et dans le domaine fr\u00e9quentiel sous le nom de marque <a href=\"https:\/\/www.novacam.com\/fr\/products\/interferometre-a-microcamera\/\">MICROCAM<sup><small>TM<\/small><\/sup>-3J\/4J.<\/a><\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mi8l4-cb44c40eb6640ac6c168f509fa9f3a30\">\n#top .hr.hr-invisible.av-mi8l4-cb44c40eb6640ac6c168f509fa9f3a30{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-mi8l4-cb44c40eb6640ac6c168f509fa9f3a30 hr-invisible  avia-builder-el-31  el_after_av_one_full  el_before_av_one_full'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fwyxf-d0f77978b5dff1d1367f98950eefe160\">\n.flex_column.av-fwyxf-d0f77978b5dff1d1367f98950eefe160{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fwyxf-d0f77978b5dff1d1367f98950eefe160 av_one_full  avia-builder-el-32  el_after_av_hr  el_before_av_two_fifth  first flex_column_div av-zero-column-padding'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jhc3ylfa-e69f3d2ea4f1ca45379132611fcff224\">\n#top .av-special-heading.av-jhc3ylfa-e69f3d2ea4f1ca45379132611fcff224{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-jhc3ylfa-e69f3d2ea4f1ca45379132611fcff224 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-jhc3ylfa-e69f3d2ea4f1ca45379132611fcff224 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-jhc3ylfa-e69f3d2ea4f1ca45379132611fcff224 av-special-heading-h3  avia-builder-el-33  avia-builder-el-no-sibling'><h3 class='av-special-heading-tag'  itemprop=\"headline\"  >Liens connexes<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-tix1n-03fbeadfae75efb106c9dae7b5f0320c\">\n.flex_column.av-tix1n-03fbeadfae75efb106c9dae7b5f0320c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-tix1n-03fbeadfae75efb106c9dae7b5f0320c av_two_fifth  avia-builder-el-34  el_after_av_one_full  el_before_av_one_fourth  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-24dm3-a3b9ceb628b014aead43fab5d2a507b7'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-cn0sb-06317cc36f0cbcb81254298732237865\">\n.av_font_icon.av-cn0sb-06317cc36f0cbcb81254298732237865 .av-icon-char{\nfont-size:20px;\nline-height:20px;\n}\n<\/style>\n<span  class='av_font_icon av-cn0sb-06317cc36f0cbcb81254298732237865 avia_animate_when_visible av-icon-style- avia-icon-pos-left av-no-color avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue81e' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<p>En savoir plus :<\/p>\n<ul>\n<li><a href=\"https:\/\/www.novacam.com\/fr\/technologie\/what-we-measure\/\">Tout ce que nous pouvons mesurer<\/a> avec la technologie LCI<\/li>\n<li><a href=\"https:\/\/www.novacam.com\/fr\/technologie\/avantages\/\">Avantages<\/a> que les syst\u00e8mes LCI \u00e0 base de fibres NOVACAM offrent<\/li>\n<\/ul>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18g1gr-3fb8df32a9c94486c488f834c640d0cd\">\n.flex_column.av-18g1gr-3fb8df32a9c94486c488f834c640d0cd{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-18g1gr-3fb8df32a9c94486c488f834c640d0cd av_one_fourth  avia-builder-el-37  el_after_av_two_fifth  el_before_av_one_third  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-3ncs3-9755d2f2237c148e459fbf79ca214fb4'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/www.novacam.com\/fr\/products\/\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-waioz-15129e036111ecc60b49fc74d64c8916\">\n.av_font_icon.av-waioz-15129e036111ecc60b49fc74d64c8916 .av-icon-char{\nfont-size:30px;\nline-height:30px;\n}\n<\/style>\n<span  class='av_font_icon av-waioz-15129e036111ecc60b49fc74d64c8916 avia_animate_when_visible av-icon-style- avia-icon-pos-left av-no-color avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue826' data-av_iconfont='entypo-fontello' ><\/span><\/span> Consultez NOVACAM <\/a><a href=\"https:\/\/www.novacam.com\/fr\/products\/\">3D <\/a><a href=\"https:\/\/www.novacam.com\/fr\/products\/\">syst\u00e8mes de m\u00e9trologie<\/a>\u00a0sur la base de l'ICM<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-28f0aj-9424dcdf382ee72874cfa6efbd373df1\">\n.flex_column.av-28f0aj-9424dcdf382ee72874cfa6efbd373df1{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-28f0aj-9424dcdf382ee72874cfa6efbd373df1 av_one_third  avia-builder-el-40  el_after_av_one_fourth  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-24id0r-67a7d556f54dc563c6594756a131a7e1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/nous-contacter\/\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1v8pg3-48925116ff62d88059331475f774c943\">\n.av_font_icon.av-1v8pg3-48925116ff62d88059331475f774c943 .av-icon-char{\nfont-size:30px;\nline-height:30px;\n}\n<\/style>\n<span  class='av_font_icon av-1v8pg3-48925116ff62d88059331475f774c943 avia_animate_when_visible av-icon-style- avia-icon-pos-left av-no-color avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue80b' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/a>\u00a0<a href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/nous-contacter\/\">Contactez nous<\/a>\u00a0ou <a href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/demander-un-echantillon-danalyse\/\">demander une analyse d'\u00e9chantillon gratuite<\/a> pour savoir si les interf\u00e9rom\u00e8tres \u00e0 faible coh\u00e9rence NOVACAM conviennent \u00e0 votre application<\/p>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":435,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":"","advanced-sidebar-menu\/link-title":"","advanced-sidebar-menu\/exclude-page":false},"class_list":["post-488","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How Low-Coherence Interferometry (LCI) Works - Novacam<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.novacam.com\/fr\/technologie\/comment-fonctionne-le-lci\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Low-Coherence Interferometry (LCI) Works - Novacam\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.novacam.com\/fr\/technologie\/comment-fonctionne-le-lci\/\" \/>\n<meta property=\"og:site_name\" content=\"Novacam\" \/>\n<meta property=\"article:modified_time\" content=\"2021-04-09T17:46:05+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data1\" content=\"13 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.novacam.com\/technology\/how-lci-works\/\",\"url\":\"https:\/\/www.novacam.com\/technology\/how-lci-works\/\",\"name\":\"How Low-Coherence Interferometry (LCI) Works - Novacam\",\"isPartOf\":{\"@id\":\"https:\/\/www.novacam.com\/#website\"},\"datePublished\":\"2011-04-03T09:54:57+00:00\",\"dateModified\":\"2021-04-09T17:46:05+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.novacam.com\/technology\/how-lci-works\/#breadcrumb\"},\"inLanguage\":\"fr-CA\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.novacam.com\/technology\/how-lci-works\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.novacam.com\/technology\/how-lci-works\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.novacam.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Technology\",\"item\":\"https:\/\/www.novacam.com\/technology\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"How LCI works\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.novacam.com\/#website\",\"url\":\"https:\/\/www.novacam.com\/\",\"name\":\"Novacam\",\"description\":\"High-precision non-contact 3D metrology\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.novacam.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-CA\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Comment fonctionne l'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence (LCI) - Novacam","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.novacam.com\/fr\/technologie\/comment-fonctionne-le-lci\/","og_locale":"fr_CA","og_type":"article","og_title":"How Low-Coherence Interferometry (LCI) Works - Novacam","og_url":"https:\/\/www.novacam.com\/fr\/technologie\/comment-fonctionne-le-lci\/","og_site_name":"Novacam","article_modified_time":"2021-04-09T17:46:05+00:00","twitter_card":"summary_large_image","twitter_misc":{"Estimation du temps de lecture":"13 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.novacam.com\/technology\/how-lci-works\/","url":"https:\/\/www.novacam.com\/technology\/how-lci-works\/","name":"Comment fonctionne l'interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence (LCI) - Novacam","isPartOf":{"@id":"https:\/\/www.novacam.com\/#website"},"datePublished":"2011-04-03T09:54:57+00:00","dateModified":"2021-04-09T17:46:05+00:00","breadcrumb":{"@id":"https:\/\/www.novacam.com\/technology\/how-lci-works\/#breadcrumb"},"inLanguage":"fr-CA","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.novacam.com\/technology\/how-lci-works\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.novacam.com\/technology\/how-lci-works\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.novacam.com\/"},{"@type":"ListItem","position":2,"name":"Technology","item":"https:\/\/www.novacam.com\/technology\/"},{"@type":"ListItem","position":3,"name":"How LCI works"}]},{"@type":"WebSite","@id":"https:\/\/www.novacam.com\/#website","url":"https:\/\/www.novacam.com\/","name":"Novacam","description":"M\u00e9trologie 3D sans contact de haute pr\u00e9cision","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.novacam.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-CA"}]}},"_links":{"self":[{"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/pages\/488","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/comments?post=488"}],"version-history":[{"count":47,"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/pages\/488\/revisions"}],"predecessor-version":[{"id":42365,"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/pages\/488\/revisions\/42365"}],"up":[{"embeddable":true,"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/pages\/435"}],"wp:attachment":[{"href":"https:\/\/www.novacam.com\/fr\/wp-json\/wp\/v2\/media?parent=488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}