{"id":5749,"date":"2016-04-13T10:02:22","date_gmt":"2016-04-13T10:02:22","guid":{"rendered":"https:\/\/www.ophiropt.com\/blog\/laser-measurement\/?p=5749"},"modified":"2024-06-14T07:51:47","modified_gmt":"2024-06-14T07:51:47","slug":"optical-alignment-a-simple-solution-to-an-infuriating-problem","status":"publish","type":"post","link":"https:\/\/www.ophiropt.com\/blog\/optical-alignment-a-simple-solution-to-an-infuriating-problem\/","title":{"rendered":"Optical Alignment:  A Simple Solution to an Infuriating Problem"},"content":{"rendered":"<p>Picture this:<\/p>\n<p>You\u2019re working on a complicated laser setup, with various beam splitters, attenuation, lenses and mirrors.\u00a0 You spend weeks optimizing the design, and months waiting for all the parts to arrive.<\/p>\n<p>Now everything is here and you set it up with millimeter accuracy.<\/p>\n<p>And then the big moment.\u00a0 Where\u2019s the laser beam?<\/p>\n<p><!--more-->Try as you might, you can\u2019t find the laser beam and it is far from trivial to determine what part of the design went wrong.<\/p>\n<p>We know this is worse than annoying.\u00a0 It\u2019s a huge headache, and a huge time-suck.<\/p>\n<p>A colleague of mine here at Ophir had a problem like this recently.<\/p>\n<p>He was designing a complicated optical setup for a unique, custom laser beam profiler.\u00a0 When he couldn\u2019t find the invisible (IR) laser at first, he figured, \u201cNo problem.\u00a0 We\u2019ll just use the guide laser.\u00a0 However, part of the design included filters which are meant only for infrared, and the visible guide laser was not passed through.<\/p>\n<p>After many frustrating attempts, someone finally said, \u201cWhy don\u2019t you just use a BeamTrack sensor?\u201d<\/p>\n<p>After all, it\u2019s our own product!<\/p>\n<p><a href=\"https:\/\/www.ophiropt.com\/en\/c\/laser-position-sensors\"><img decoding=\"async\" class=\"alignnone wp-image-5752 lazyload\" title=\"BeamTrack (PPS) display screen\" data-src=\"\/blog\/wp-content\/uploads\/2016\/04\/2016-4-13-blog-p2.jpg\" alt=\"\" width=\"580\" height=\"424\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 580px; --smush-placeholder-aspect-ratio: 580\/424;\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.ophiropt.com\/en\/c\/laser-position-sensors\">BeamTrack<\/a> is a regular thermal power sensor (read: broadband with high damage threshold), that can also measure position and size.\u00a0 (Ophir \u201cQuad\u201d sensors measure power and position; \u201cPPS\u201d sensors measure size as well.)<\/p>\n<p>So he stuck a beam track position (\u201cquad\u201d) sensor at different points in the optical path to try to see what went wrong.<\/p>\n<p>Within minutes, he located the problem and within two hours, he had the whole unit up and running properly.\u00a0 (This is after spending two days of head scratching and other classical techniques.)<\/p>\n<p>Lesson:<\/p>\n<p>Some people use BeamTrack since they really need to track their beam\u2019s size and position (not just power).\u00a0 But many more could benefit from one of these around the lab.<\/p>\n<p>When the time comes, you\u2019ll wish you had one.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Picture this:<\/p>\n<p>You\u2019re working on a complicated laser setup, with various beam splitters, attenuation, lenses and mirrors.  You spend weeks optimizing the design, and months waiting for all the parts to arrive.<\/p>\n<p>Now everything is here and you set it up to the millimeter.<\/p>\n<p>And then the big moment.  Where\u2019s the laser?<\/p>\n","protected":false},"author":2,"featured_media":8458,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[5,6],"tags":[17],"ophirposttype":[349],"class_list":["post-5749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laser-power-energy-measurement","category-laser-power-energy-sensors-en","tag-beamtrack-powerpositionsize-sensors","ophirposttype-blogpost-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Optical Alignment: A Simple Solution to an Infuriating Problem - Ophir Photonics<\/title>\n<meta name=\"description\" content=\"Picture this:  You\u2019re working on a complicated laser setup, with various beam splitters, attenuation, lenses and mirrors. 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