{"id":404804,"date":"2025-01-14T08:10:39","date_gmt":"2025-01-14T08:10:39","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-calculate-wavefront-rms-when-remove-tilt-is-chosen-in-wavefront-map\/"},"modified":"2025-01-14T08:10:39","modified_gmt":"2025-01-14T08:10:39","slug":"how-to-calculate-wavefront-rms-when-remove-tilt-is-chosen-in-wavefront-map","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-calculate-wavefront-rms-when-remove-tilt-is-chosen-in-wavefront-map\/","title":{"rendered":"How to calculate Wavefront RMS when &#8220;Remove Tilt&#8221; is chosen in Wavefront Map?"},"content":{"rendered":"<p>&lt;p&gt;The formula for calculating RMS in the Zemax manual is as follows\uff1a&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/14-01-2025-1736841631-mceclip0.jpg\" \/>&lt;\/p&gt;&lt;p&gt;In Wavefront Map, when &#8220;Remove Tilt &#8221; is chosen,&nbsp; using the data shown in the txt and the formula above\uff0cI calculated the RMS by Matlab.&lt;\/p&gt;&lt;p&gt;&nbsp;Why is the RMS I calculated different from what Zemax displays\uff1fThe difference between two RMS is 0.003 wave.&lt;\/p&gt;&lt;p&gt;Why is the calculated RMS different from what Zemax displays, even if all data and RMS formulas are provided by Zemax\uff1f&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/14-01-2025-1736841656-mceclip1.jpg\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-404804","topic","type-topic","status-publish","hentry","topic-tag-rms","topic-tag-wavefront"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"The formula for calculating RMS in the Zemax manual is as follows\uff1aIn Wavefront Map, when &quot;Remove Tilt &quot; is chosen, using the data shown in the txt and the formula above\uff0cI calculated the RMS by Matlab. Why is the RMS I calculated different from what Zemax displays\uff1fThe difference between two RMS is 0.003 wave.Why is the\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-calculate-wavefront-rms-when-remove-tilt-is-chosen-in-wavefront-map\/\" \/>\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=\"How to calculate Wavefront RMS when \u201cRemove Tilt\u201d is chosen in Wavefront Map? | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"The formula for calculating RMS in the Zemax manual is as follows\uff1aIn Wavefront Map, when &quot;Remove Tilt &quot; is chosen, using the data shown in the txt and the formula above\uff0cI calculated the RMS by Matlab. 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