{"id":29153,"date":"2026-02-05T19:23:01","date_gmt":"2026-02-05T18:23:01","guid":{"rendered":"https:\/\/www.heliotis.com\/tutorials2\/roughness-according-to-iso-21920\/"},"modified":"2026-08-16T20:00:37","modified_gmt":"2026-08-16T18:00:37","slug":"roughness-according-to-iso-21920","status":"publish","type":"tutorial","link":"https:\/\/www.heliotis.com\/en\/tutorials2\/roughness-according-to-iso-21920\/","title":{"rendered":"Roughness according to ISO 21920"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">ISO 21920 defines the profile-based evaluation of surface roughness and forms the basis for classic tactile roughness measurements. In this tutorial, we compare tactile measurement with non-contact roughness measurement using white light interferometry (WLI) and show how comparable roughness parameters can be determined with a Heliotis 3D measuring system. <\/p>\n\n<figure class=\"wp-block-video\"><video height=\"720\" style=\"aspect-ratio: 1280 \/ 720;\" width=\"1280\" controls=\"\" src=\"https:\/\/www.heliotis.com\/wp-content\/uploads\/2026\/08\/Microscale-Defect-Inspection-and-Surface-Metrology-Part-2.mp4\"><\/video><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>ISO 21920 defines the profile-based evaluation of surface roughness and forms the basis for classic tactile roughness measurements. In this tutorial, we compare tactile measurement with non-contact roughness measurement using white light interferometry (WLI) and show how comparable roughness parameters can be determined with a Heliotis 3D measuring system.<\/p>\n","protected":false},"author":4,"featured_media":29154,"template":"","class_list":["post-29153","tutorial","type-tutorial","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/tutorial\/29153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/tutorial"}],"about":[{"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/types\/tutorial"}],"author":[{"embeddable":true,"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/users\/4"}],"version-history":[{"count":1,"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/tutorial\/29153\/revisions"}],"predecessor-version":[{"id":29155,"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/tutorial\/29153\/revisions\/29155"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/media\/29154"}],"wp:attachment":[{"href":"https:\/\/www.heliotis.com\/en\/wp-json\/wp\/v2\/media?parent=29153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}