{"version":"1.0","provider_name":"Engineer News Network","provider_url":"https:\/\/www.engineernewsnetwork.com\/blog","title":"Measuring super smooth surfaces - Engineer News Network","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"LLlFWuUb1k\"><a href=\"https:\/\/www.engineernewsnetwork.com\/blog\/measuring-super-smooth-surfaces\/\">Measuring super smooth surfaces<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.engineernewsnetwork.com\/blog\/measuring-super-smooth-surfaces\/embed\/#?secret=LLlFWuUb1k\" width=\"600\" height=\"338\" title=\"&#8220;Measuring super smooth surfaces&#8221; &#8212; Engineer News Network\" data-secret=\"LLlFWuUb1k\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.engineernewsnetwork.com\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"While the measurement of super smooth surfaces typically requires the use of optical metrology tools, it is important to realise that not all optical solutions are the same. Eric Felkel reports","thumbnail_url":"https:\/\/www.engineernewsnetwork.com\/blog\/wp-content\/uploads\/2020\/08\/Figure-1.-PSD-with-poorly-aligned-slice-a-pp-884x1024.jpg"}