{"id":87838,"date":"2015-05-22T03:00:00","date_gmt":"2015-05-22T00:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=f3df580a699d1ad1a772815f84dbafd4"},"modified":"2015-05-22T03:00:00","modified_gmt":"2015-05-22T00:00:00","slug":"non-quadrature-amplitude-modulation-a-novel-interferometric-method-for-phase-retrieval","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=87838","title":{"rendered":"Non-quadrature amplitude modulation: a novel interferometric method for phase retrieval"},"content":{"rendered":"<p>Phase-shifting interferometry (PSI) is a well-known technique used to calculate the phase of a<br \/>\nresulting wavefront. This wavefront is commonly originated from the superposition of a known<br \/>\nreference wavefront with a distorted wavefront, resulting in an interference pattern. In order to<br \/>\nextract information about the resulting wavefront (which can be related to surfaces thicknesses,<br \/>\nsurface roughness, optical power, material homogeneity, temperature, index of refraction, just to<br \/>\nmention a few), a set of interference patterns are generally changed in a known phase-step to form a<br \/>\nresoluble system of equations. In PSI the contrast, visibility and phase variations of the resulting<br \/>\ninterference patterns are considered homogeneous and spatially constant, respectively. These<br \/>\nconditions are hard to obtain experimentally, even though a carefully calibrated phase shifter<br \/>\nand\/or optical elements of high quality are used to carry out the experimental setup. In this<br \/>\nmanuscript, we present a nove&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Phase-shifting interferometry (PSI) is a well-known technique used to calculate the phase of a<br \/>\nresulting wavefront. This wavefront is commonly originated from the superposition of a known<br \/>\nreference wavefront with a distorted wavefront, resulting in a&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-87838","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/87838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=87838"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/87838\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=87838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=87838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=87838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}