{"id":406,"date":"2017-03-29T19:43:32","date_gmt":"2017-03-29T19:43:32","guid":{"rendered":"https:\/\/beta.research.ece.ncsu.edu\/osl\/?p=406"},"modified":"2017-03-29T19:43:32","modified_gmt":"2017-03-29T19:43:32","slug":"faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer","status":"publish","type":"post","link":"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\/","title":{"rendered":"Faceted grating prism for a computed tomographic imaging spectrometer"},"content":{"rendered":"<p>Abstract. A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA). The 3-D datacube is subsequently reconstructed from these 2-D projections using iterative computed tomography algorithms. Conventional designs achieve the 3-D to 2-D mapping by incorporating an optimized disperser. However, these dispersers suffer from the linearity constraint inherent in the first-order grating equation. This constraint means that many of the FPA\u2019s pixels are either unilluminated or they are used to image redundant projections; in both cases, they can not be used to increase the datacube\u2019s spectral resolution. Here, we outline various hardware improvements that increase the CTIS\u2019s spectral resolution by making use of these previously unilluminated or redundant pixels. Specifically, we incorporated a new disperser based on a 2-D grating prism and a division of aperture approach. Included is an optical design analysis of the system, in addition to an experimental characterization of the instrument\u2019s performance. Lastly, the new disperser is compared to a conventional disperser to quantify the increased spectral resolution.<\/p>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">\n<div class=\"csl-left-margin\">M. W. Kudenov, J. Craven-Jones, R. Aumiller, C. Vandervlugt, and E. L. Dereniak, &#8220;Faceted grating prism for a computed tomographic imaging spectrometer,&#8221; Opt. Eng <b>51<\/b>, 044002-1 (2012).<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Abstract. A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA)&#8230;.<\/p>\n","protected":false},"author":103,"featured_media":407,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[6],"tags":[],"class_list":["post-406","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-papers"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Abstract. A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA). The 3-D datacube is subsequently reconstructed from these 2-D projections using iterative computed tomography algorithms. Conventional designs achieve the 3-D to 2-D mapping by incorporating an optimized disperser. However, these\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"mwkudeno\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\/\" \/>\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=\"OSL | Optical Sensing Lab\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Faceted grating prism for a computed tomographic imaging spectrometer | OSL\" \/>\n\t\t<meta property=\"og:description\" content=\"Abstract. A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA). The 3-D datacube is subsequently reconstructed from these 2-D projections using iterative computed tomography algorithms. Conventional designs achieve the 3-D to 2-D mapping by incorporating an optimized disperser. However, these\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2017-03-29T19:43:32+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2017-03-29T19:43:32+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Faceted grating prism for a computed tomographic imaging spectrometer | OSL\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Abstract. A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA). The 3-D datacube is subsequently reconstructed from these 2-D projections using iterative computed tomography algorithms. Conventional designs achieve the 3-D to 2-D mapping by incorporating an optimized disperser. However, these\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#article\",\"name\":\"Faceted grating prism for a computed tomographic imaging spectrometer | OSL\",\"headline\":\"Faceted grating prism for a computed tomographic imaging spectrometer\",\"author\":{\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/author\\\/mwkudeno\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/wp-content\\\/uploads\\\/sites\\\/27\\\/2017\\\/03\\\/ctis-grism.jpg\",\"width\":970,\"height\":1136},\"datePublished\":\"2017-03-29T19:43:32+00:00\",\"dateModified\":\"2017-03-29T19:43:32+00:00\",\"inLanguage\":\"en-US\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#webpage\"},\"articleSection\":\"Research Papers\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/category\\\/research-papers\\\/#listItem\",\"name\":\"Research Papers\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/category\\\/research-papers\\\/#listItem\",\"position\":2,\"name\":\"Research Papers\",\"item\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/category\\\/research-papers\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#listItem\",\"name\":\"Faceted grating prism for a computed tomographic imaging spectrometer\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#listItem\",\"position\":3,\"name\":\"Faceted grating prism for a computed tomographic imaging spectrometer\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/category\\\/research-papers\\\/#listItem\",\"name\":\"Research Papers\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/#organization\",\"name\":\"OSL\",\"description\":\"Optical Sensing Lab\",\"url\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/author\\\/mwkudeno\\\/#author\",\"url\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/author\\\/mwkudeno\\\/\",\"name\":\"mwkudeno\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/4d7f79345fade5e02bd393168d3cafc1eff625e1e2a2cb3a46b14a67e0e32238?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"mwkudeno\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/#webpage\",\"url\":\"https:\\\/\\\/research.ece.ncsu.edu\\\/osl\\\/2017\\\/03\\\/29\\\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\\\/\",\"name\":\"Faceted grating prism for a computed tomographic imaging spectrometer | OSL\",\"description\":\"Abstract. 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A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA). The 3-D datacube is subsequently reconstructed from these 2-D projections using iterative computed tomography algorithms. Conventional designs achieve the 3-D to 2-D mapping by incorporating an optimized disperser. However, these","og:url":"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/faceted-grating-prism-for-a-computed-tomographic-imaging-spectrometer\/","article:published_time":"2017-03-29T19:43:32+00:00","article:modified_time":"2017-03-29T19:43:32+00:00","twitter:card":"summary","twitter:title":"Faceted grating prism for a computed tomographic imaging spectrometer | OSL","twitter:description":"Abstract. A computed tomographic imaging spectrometer (CTIS) disperses the three-dimensional (3-D) datacube (x, y, \u03bb) into two-dimensional (2-D) projections on a focal plane array (FPA). 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