{"id":56852,"date":"2026-11-05T04:09:25","date_gmt":"2026-11-05T08:09:25","guid":{"rendered":"https:\/\/www.novacam.com\/?p=56852"},"modified":"2026-11-05T04:10:26","modified_gmt":"2026-11-05T08:10:26","slug":"optical-vs-contact-profilometer","status":"publish","type":"post","link":"https:\/\/www.novacam.com\/fr\/2026\/11\/05\/optical-vs-contact-profilometer\/","title":{"rendered":"Profilom\u00e8tre optique ou \u00e0 contact (stylet) : lequel choisir?"},"content":{"rendered":"<p>Les deux instruments mesurent des profils de surface, mais de fa\u00e7on diff\u00e9rente. Un profilom\u00e8tre \u00e0 contact fait glisser un stylet sur la pi\u00e8ce; un profilom\u00e8tre optique mesure avec la lumi\u00e8re et ne la touche jamais. Le bon choix d\u00e9pend de la surface, de son emplacement et de ce que vous devez faire des donn\u00e9es.<\/p>\n<div class=\"nc-top\">\n<div class=\"nc-top-btns\"><a class=\"nc-btn\" href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/demander-un-echantillon-danalyse\/\">Demander une analyse d'\u00e9chantillon gratuite<\/a><a class=\"nc-btn nc-btn-alt\" href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/nous-contacter\/\">Parler \u00e0 un ing\u00e9nieur d'application<\/a><\/div>\n<\/div>\n<h2>Fonctionnement d'un profilom\u00e8tre \u00e0 contact (stylet)<\/h2>\n<p>Un stylet fin est d\u00e9plac\u00e9 sur la surface et ses mouvements verticaux sont enregistr\u00e9s sous forme de ligne de profil. C'est une m\u00e9thode connue et bien \u00e9tablie, et de nombreuses proc\u00e9dures de mesure de rugosit\u00e9 ont d'abord \u00e9t\u00e9 r\u00e9dig\u00e9es autour d'elle. Comme le stylet touche la pi\u00e8ce, il peut laisser des traces sur les surfaces tendres ou d\u00e9licates, et sa pointe s'use et doit \u00eatre remplac\u00e9e.<\/p>\n<h2>Fonctionnement d'un profilom\u00e8tre optique (sans contact)<\/h2>\n<p>Un profilom\u00e8tre optique, aussi appel\u00e9 profileur de surface optique, mesure la topographie d'une surface avec la lumi\u00e8re et en construit une carte 3D. Le <a href=\"https:\/\/www.novacam.com\/fr\/produits\/profilometres\/\">profilom\u00e8tre optique 3D<\/a> NOVACAM (syst\u00e8me PROFILOM\u00c8TRE OPTIQUE 3D) utilise <a href=\"https:\/\/www.novacam.com\/fr\/technologie\/comment-fonctionne-le-lci\/\">interf\u00e9rom\u00e9trie \u00e0 faible coh\u00e9rence<\/a> et des sondes \u00e0 fibre optique. Il mesure les dimensions, la rugosit\u00e9, les d\u00e9fauts et l'\u00e9paisseur des couches semi-transparentes avec une pr\u00e9cision microm\u00e9trique.<\/p>\n<h2>Profilom\u00e8tre optique ou \u00e0 contact : comparaison<\/h2>\n<table class=\"nc-compare\">\n<thead>\n<tr>\n<th><\/th>\n<th>Profilom\u00e8tre \u00e0 contact (stylet)<\/th>\n<th>PROFILOM\u00c8TRE OPTIQUE 3D NOVACAM<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Touche la pi\u00e8ce<\/td>\n<td>Oui<\/td>\n<td>Non<\/td>\n<\/tr>\n<tr>\n<td>Donn\u00e9es<\/td>\n<td>Lignes de profil<\/td>\n<td>Nuage de points 3D et profils<\/td>\n<\/tr>\n<tr>\n<td>Risque pour la surface<\/td>\n<td>Le stylet peut laisser des traces<\/td>\n<td>Aucun<\/td>\n<\/tr>\n<tr>\n<td>Consommables<\/td>\n<td>Les pointes de stylet s'usent<\/td>\n<td>Aucun; les sondes optiques ne s'usent pas<\/td>\n<\/tr>\n<tr>\n<td>Int\u00e9rieur des al\u00e9sages et espaces restreints<\/td>\n<td>Limit\u00e9 par le bras du stylet<\/td>\n<td>Les sondes \u00e0 vis\u00e9e lat\u00e9rale balaient l'int\u00e9rieur des al\u00e9sages; une sonde standard de \u23004,6 mm atteint des diam\u00e8tres int\u00e9rieurs jusqu'\u00e0 300 mm (12 po) de profondeur<\/td>\n<\/tr>\n<tr>\n<td>\u00c9paisseur des rev\u00eatements<\/td>\n<td>Non<\/td>\n<td>Couches semi-transparentes, de 10 \u00b5m \u00e0 7 mm selon la configuration<\/td>\n<\/tr>\n<tr>\n<td>R\u00e9solution axiale \/ r\u00e9p\u00e9tabilit\u00e9<\/td>\n<td>D\u00e9pend de l'instrument<\/td>\n<td>&lt; 0,5 \u00b5m \/ &lt; 1 \u00b5m<\/td>\n<\/tr>\n<tr>\n<td>Vitesse<\/td>\n<td>Ligne par ligne<\/td>\n<td>Taux d'acquisition jusqu'\u00e0 100 kHz<\/td>\n<\/tr>\n<tr>\n<td>Automatisation<\/td>\n<td>Variable<\/td>\n<td>S\u00e9quences programm\u00e9es avec une manette; laboratoire, atelier, en ligne et sur robot<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quand un profilom\u00e8tre \u00e0 stylet suffit<\/h2>\n<p>Un instrument \u00e0 stylet peut \u00eatre un choix raisonnable lorsque la surface est facile d'acc\u00e8s, tol\u00e8re le contact et qu'une seule ligne de profil r\u00e9pond \u00e0 la question, par exemple lorsqu'un laboratoire a d\u00e9j\u00e0 une proc\u00e9dure fond\u00e9e sur le contact.<\/p>\n<h2>Quand un profilom\u00e8tre optique est le meilleur choix<\/h2>\n<ul>\n<li><strong>La surface ne doit pas \u00eatre marqu\u00e9e :<\/strong> surfaces tendres, rev\u00eatues ou finies, ou pi\u00e8ces qui retournent directement en production.<\/li>\n<li><strong>Vous avez besoin de 3D, pas d'une seule ligne :<\/strong> dimensions, g\u00e9om\u00e9trie (GD&amp;T), d\u00e9fauts et <a href=\"https:\/\/www.novacam.com\/fr\/applications\/rugosite\/\">rugosit\u00e9<\/a> \u00e0 partir du m\u00eame balayage.<\/li>\n<li><strong>La surface est difficile d'acc\u00e8s :<\/strong> diam\u00e8tres int\u00e9rieurs d'al\u00e9sages, fentes et trous borgnes, et autres \u00e9l\u00e9ments \u00e0 rapport d'aspect \u00e9lev\u00e9, selon leur g\u00e9om\u00e9trie.<\/li>\n<li><strong>Vous voulez mesurer l'\u00e9paisseur d'un rev\u00eatement<\/strong> sur des couches semi-transparentes \u00e0 la lumi\u00e8re infrarouge.<\/li>\n<li><strong>La mesure se fait en atelier ou en ligne :<\/strong> les sondes s'int\u00e8grent \u00e0 des platines de pr\u00e9cision, \u00e0 des MMT tierces, \u00e0 des machines \u00e0 commande num\u00e9rique et \u00e0 des robots, et peuvent \u00eatre configur\u00e9es pour des environnements hostiles comme la chaleur extr\u00eame, les conditions cryog\u00e9niques ou radioactives.<\/li>\n<li><strong>Les temps d'arr\u00eat comptent :<\/strong> aucune pointe de stylet \u00e0 remplacer ni arr\u00eat pour changer des sondes us\u00e9es.<\/li>\n<\/ul>\n<p>Les utilisations typiques couvrent de nombreuses industries, comme l'a\u00e9rospatiale, la production d'\u00e9nergie, les dispositifs m\u00e9dicaux, l'automobile, les semi-conducteurs et la fabrication additive, etc. Pour les grandes surfaces balay\u00e9es selon un motif matriciel, voir aussi le <a href=\"https:\/\/www.novacam.com\/fr\/produits\/surfaceinspect-pour-3d-metrologie-dimensions-rugosite-epaisseur-2\/\">Syst\u00e8me SURFACEINSPECT<\/a>.<\/p>\n<h2>Questions fr\u00e9quemment pos\u00e9es<\/h2>\n<p><strong>Quelle est la diff\u00e9rence entre un profilom\u00e8tre optique et un profilom\u00e8tre \u00e0 contact?<\/strong><\/p>\n<p>Un profilom\u00e8tre \u00e0 contact fait glisser un stylet sur la surface et enregistre une ligne de profil. Un profilom\u00e8tre optique mesure avec la lumi\u00e8re, ne touche jamais la pi\u00e8ce et peut construire une carte 3D compl\u00e8te de la surface.<\/p>\n<p><strong>Un profilom\u00e8tre optique est-il assez pr\u00e9cis pour mesurer la rugosit\u00e9?<\/strong><\/p>\n<p>Le PROFILOM\u00c8TRE OPTIQUE 3D NOVACAM a une r\u00e9solution axiale inf\u00e9rieure \u00e0 0,5 \u00b5m et une r\u00e9p\u00e9tabilit\u00e9 inf\u00e9rieure \u00e0 1 \u00b5m, et il mesure la rugosit\u00e9 et les dimensions avec la m\u00eame sonde.<\/p>\n<p><strong>Un profilom\u00e8tre optique peut-il mesurer l'int\u00e9rieur d'un al\u00e9sage?<\/strong><\/p>\n<p>Oui. Les sondes \u00e0 vis\u00e9e lat\u00e9rale balaient l'int\u00e9rieur des al\u00e9sages et d'autres espaces restreints, et des sondes \u00e0 vis\u00e9e frontale sont aussi offertes. Pour l'inspection d'al\u00e9sages, voir le <a href=\"https:\/\/www.novacam.com\/fr\/produits\/boreinspect-pour-la-metrologie-des-alesages-en-3d\/\">Syst\u00e8me BOREINSPECT<\/a>.<\/p>\n<p><strong>Peut-il mesurer l'\u00e9paisseur d'un rev\u00eatement?<\/strong><\/p>\n<p>Oui, si le rev\u00eatement est semi-transparent \u00e0 la lumi\u00e8re infrarouge et a une \u00e9paisseur optique d'au moins 20 \u00b5m (\u00e9paisseur optique = \u00e9paisseur physique \u00d7 indice de r\u00e9fraction).<\/p>\n<p><strong>Peut-il \u00eatre utilis\u00e9 en atelier de production?<\/strong><\/p>\n<p>Oui. Il convient \u00e0 l'inspection en laboratoire comme en atelier, avec des configurations en ligne et sur robot en option.<\/p>\n<div class=\"nc-cta\">\n<h3>Vous ne savez pas quelle approche convient \u00e0 votre pi\u00e8ce?<\/h3>\n<p>Envoyez-nous un \u00e9chantillon et nous vous montrerons ce que la mesure 3D sans contact peut saisir.<\/p>\n<p><a class=\"nc-cta-btn\" href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/demander-un-echantillon-danalyse\/\">Demander une analyse d'\u00e9chantillon gratuite<\/a><a class=\"nc-cta-btn nc-cta-btn-alt\" href=\"https:\/\/www.novacam.com\/fr\/nous-contacter-2\/nous-contacter\/\">Parler \u00e0 un ing\u00e9nieur d'application<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Profilom\u00e8tres optiques (sans contact) et \u00e0 stylet compar\u00e9s : fonctionnement, donn\u00e9es obtenues, risque pour la surface, zones difficiles d'acc\u00e8s et automatisation.<\/p>","protected":false},"author":1,"featured_media":42449,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","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":""},"categories":[27,4],"tags":[],"class_list":["post-56852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Optical vs. Contact Profilometer: Which Should You Use? 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