{"id":379421,"date":"2024-08-20T08:01:16","date_gmt":"2024-08-20T08:01:16","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/question-about-defect-on-a-metal-surface\/"},"modified":"2024-08-20T08:01:16","modified_gmt":"2024-08-20T08:01:16","slug":"question-about-defect-on-a-metal-surface","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/question-about-defect-on-a-metal-surface\/","title":{"rendered":"Question about &#8220;Defect on a metal surface&#8221;"},"content":{"rendered":"<p>https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360041780494-Defect-on-a-metal-surface<\/p>\n<p>1)_The illumination in this article is assumed to be a focused spot rather than illumination over a specific area. Are there any other articles that use standard image calculation with illumination over a specific area?<\/p>\n<p>2)_The EP, ES and Ex,Ey transformation confused me. Please see the description below.<\/p>\n<p>Why is the transformation matrix multiplied again in line 191 &amp; 192.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/20-08-2024-1724140290-p1.png\" alt=\"\" width=\"550\" height=\"367\"><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/20-08-2024-1724140323-p2.png\" alt=\"\" width=\"532\" height=\"312\"><\/p>\n","protected":false},"template":"","class_list":["post-379421","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360041780494-Defect-on-a-metal-surface1)_The illumination in this article is assumed to be a focused spot rather than illumination over a specific area. Are there any other articles that use standard image calculation with illumination over a specific area?2)_The EP, ES and Ex,Ey transformation confused me. Please see the description below.Why is the transformation matrix multiplied again in line\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/question-about-defect-on-a-metal-surface\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Question about \u201cDefect on a metal surface\u201d | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360041780494-Defect-on-a-metal-surface1)_The illumination in this article is assumed to be a focused spot rather than illumination over a specific area. 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Are there any other articles that use standard image calculation with illumination over a specific area?2)_The EP, ES and Ex,Ey transformation confused me. Please see the description below.Why is the transformation matrix multiplied again in line\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/08\/20-08-2024-1724140290-p1.png\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/question-about-defect-on-a-metal-surface\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/question-about-defect-on-a-metal-surface\\\/#listItem\",\"name\":\"Question about &#8220;Defect on a metal surface&#8221;\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/question-about-defect-on-a-metal-surface\\\/#listItem\",\"position\":3,\"name\":\"Question about &#8220;Defect on a metal surface&#8221;\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/question-about-defect-on-a-metal-surface\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/question-about-defect-on-a-metal-surface\\\/\",\"name\":\"Question about \\u201cDefect on a metal surface\\u201d | Ansys Learning Forum\",\"description\":\"https:\\\/\\\/optics.ansys.com\\\/hc\\\/en-us\\\/articles\\\/360041780494-Defect-on-a-metal-surface1)_The illumination in this article is assumed to be a focused spot rather than illumination over a specific area. Are there any other articles that use standard image calculation with illumination over a specific area?2)_The EP, ES and Ex,Ey transformation confused me. 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