{"id":296,"date":"2025-08-27T20:10:33","date_gmt":"2025-08-27T11:10:33","guid":{"rendered":"https:\/\/www.hulinks.co.jp\/en\/?page_id=296"},"modified":"2025-10-07T17:23:53","modified_gmt":"2025-10-07T08:23:53","slug":"broadband-ar","status":"publish","type":"page","link":"https:\/\/www.hulinks.co.jp\/en\/tfcalc\/examples\/list-of-coating-design\/broadband-ar\/","title":{"rendered":"Broadband AR for a Cone of Light"},"content":{"rendered":"\n<h1 class=\"wp-block-heading is-style-nostyle\">List of coating design exapmles<\/h1>\n\n\n\n<h2 class=\"wp-block-heading is-style-bottomline\">Broadband AR for a Cone of Light<\/h2>\n\n\n\n<p>Here we consider a coating on glass that reflects only 0.5% of a cone of light for a range of wavelengths from 420 to 680 nm. The cone axis is normal to the glass. The cone has an F-number of 0.778, which means the half-angle is 40 degrees. An uncoated glass surface reflects 4.4% of this cone of light. We use a feature new to version 3.5: cone-angle targets. As optimization targets we use R &lt; 0.5% for wavelengths 420, 425, 430,\u2026, 680 and for a 40-degree cone<\/p>\n\n\n\n<p>In TFCalc, these targets are easy to enter by using the \u201cGenerate Cone Targets\u201d command on the Options menu of the \u201cTargets \u2013 Cone Angle\u201d window. We use TFCalc\u2019s needle\/tunneling optimization to design the coating from \u201cscratch\u201d. That is, we begin the design process with a single thin layer of TiO2 and allow TFCalc to increase the thickness and number of layers in the design. TFCalc finds a 6-layer design in a few minutes. The performance of this design is shown below. The little circles indicate the optimization targets.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"360\" src=\"https:\/\/www.hulinks.co.jp\/en\/wp-content\/uploads\/sites\/2\/software\/tfcalc\/tf_bar_1.gif\" alt=\"\" class=\"wp-image-295\" \/><\/figure><\/div>\n\n\n<p>Here is the design, starting with the layer closest to glass, and with thicknesses given in nm:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TIO2\t  11.04\nSIO2\t  44.43\nTIO2\t  34.99\nSIO2\t  28.25\nTIO2\t  30.46\nSIO2\t 104.92<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>List of coating design exapmles Broadband AR for a Cone of Light Here we consider a coating on glass that reflects only 0.5% of a cone of light for a range of wavelengths from 420 to 680 nm. The cone axis is normal to the glass. The cone has an F-number of 0.778, which means&#8230;<\/p>\n","protected":false},"author":15,"featured_media":0,"parent":258,"menu_order":16,"comment_status":"closed","ping_status":"closed","template":"liquid.php","meta":{"footnotes":""},"tags":[],"class_list":["post-296","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/pages\/296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/comments?post=296"}],"version-history":[{"count":3,"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/pages\/296\/revisions"}],"predecessor-version":[{"id":680,"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/pages\/296\/revisions\/680"}],"up":[{"embeddable":true,"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/pages\/258"}],"wp:attachment":[{"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/media?parent=296"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hulinks.co.jp\/en\/wp-json\/wp\/v2\/tags?post=296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}