{"id":21107,"date":"2022-05-05T22:41:49","date_gmt":"2022-05-05T14:41:49","guid":{"rendered":"https:\/\/iridian.com.cn\/?p=21107"},"modified":"2022-05-11T05:53:30","modified_gmt":"2022-05-10T21:53:30","slug":"filter-specs-vs-functional-specs-the-pitfall-of-double-margining","status":"publish","type":"post","link":"https:\/\/iridian.com.cn\/en\/learning_center\/filter-specs-vs-functional-specs-the-pitfall-of-double-margining\/","title":{"rendered":"Filter specs vs Functional specs \u2013 the pitfall of double margining"},"content":{"rendered":"

In designing a filter solution, the filter manufacturer takes the values requested by the user and adds additional design margin to account for both functional effects (such as wavelength shift due to angle variation, thermal induced wavelength shift, etc) and filter manufacturing effects (such as edge steepness, nonuniformity, wavelength targeting \u2013 see our technical note \u201cWavelength budgeting for optical filters<\/a>\u201d).<\/p>\n

Often customers translate functional requirements of their system (e.g. pass light source 1 @ \u03bb1<\/sub>, block light source 2 @ \u03bb2<\/sub>) and add wavelength \u201cpadding\u201d to the values to create the \u201cfilter spec\u201d (e.g. CWL, FWHM, etc).\u00a0\u00a0 When the values provided have been \u201cpadded\u201d the result is over margining (or under margining) of the transmission\/blocking wavelengths. This result is a more costly solution with compromised performance. Given the functional requirements of your system, Iridian\u2019s expert designers can produce a filter specification that will provide the best performance for your request.<\/p>\n

 <\/p>\n\n\n\n\n\t\n\t\n\t\n\t
\"\"<\/a><\/td>\"\"<\/a><\/td>\n<\/tr>\n
Provide the spectral bands of your application (including all uncertainties)<\/td>Specify a CWL, FWHM, etc. with assumptions on manufacturing margin<\/td>\n<\/tr>\n
Provide the AOI range and cone angle of your beam<\/td>Specify spectral widths assuming certain AOI shifts<\/td>\n<\/tr>\n
Provide the functional requirement for spectral width and depth of blocking bands<\/td>Add margin to spectral width or depth which adds unnecessary cost and can degrade overall performance.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

 <\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

In designing a filter solution, the filter manufacturer takes the values requested by the user and adds additional design margin to account for both functional effects (such as wavelength shift due to angle variation, thermal induced wavelength shift, etc) and filter manufacturing effects (such as edge steepness, nonuniformity, wavelength targeting \u2013 see our technical note […]<\/p>\n","protected":false},"author":159,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2217,2205,2211],"tags":[],"class_list":["post-21107","post","type-post","status-publish","format-standard","hentry","category-featured","category-learning_center","category-tech_notes"],"acf":[],"_links":{"self":[{"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/posts\/21107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/users\/159"}],"replies":[{"embeddable":true,"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/comments?post=21107"}],"version-history":[{"count":2,"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/posts\/21107\/revisions"}],"predecessor-version":[{"id":21109,"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/posts\/21107\/revisions\/21109"}],"wp:attachment":[{"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/media?parent=21107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/categories?post=21107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iridian.com.cn\/en\/wp-json\/wp\/v2\/tags?post=21107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}