{"id":3797,"date":"2023-03-03T16:45:20","date_gmt":"2023-03-03T16:45:20","guid":{"rendered":"https:\/\/learningspaces.dundee.ac.uk\/dundeeuniculture\/?p=3797"},"modified":"2025-09-15T10:46:31","modified_gmt":"2025-09-15T09:46:31","slug":"through-the-lens-part-1-5-the-instagram-filter-that-you-can-hold","status":"publish","type":"post","link":"https:\/\/sites.dundee.ac.uk\/culture\/through-the-lens-part-1-5-the-instagram-filter-that-you-can-hold\/","title":{"rendered":"Through the Lens (Part 1.5) – The Instagram Filter that you can hold"},"content":{"rendered":"

In our museum collections is a small leather wallet with what first appears to be a piece of clear framed glass inside. It doesn’t look like much, but this is actually a diffraction grid – used to separate light into it’s component wavelengths – think something along the lines of Pink Floyd’s Dark Side of the Moon album cover.<\/p>\n

They work by having thousands of tiny ruled lines etched into the surface allowing the light to bounce off dramatically. They are used in a lot of different fields – including light analysis and laser optics.<\/p>\n

 <\/p>\n

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\u00a0One Diffraction Grating in our Collections<\/figcaption><\/figure>\n

Our particular grating is from the early 1900s and has 14,400 lines per inch meaning we get a stunning display of rainbows when light is viewed through it. Volunteer Angharad @amjones_art and I took the opportunity of some early March sunshine to walk around campus and take photographs through the lens on a smartphone – the results speak for themselves!<\/p>\n

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\u00a0The Tower Building<\/figcaption><\/figure>\n
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\u00a0Geddes Quadrangle<\/figcaption><\/figure>\n
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Sundial at Geddes Quadrangle<\/figcaption><\/figure>\n
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\u00a0The Carnegie Building<\/figcaption><\/figure>\n
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\u00a0Staircase – Tower Building<\/figcaption><\/figure>\n
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\u00a0Back of the Library – Can you spot the four Magpies on the Tree?<\/figcaption><\/figure>\n
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Duncan of Jordanstone College of Art and Design – Floor Six<\/figcaption><\/figure>\n
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Duncan of Jordanstone College of Art and Design – Floor Five Crawford Building Statue<\/figcaption><\/figure>\n
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Walkway from Matthew to Crawford Building – Duncan of Jordanstone College of Art and Design<\/figcaption><\/figure>\n
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Of course we had to finish with Museum Services!<\/figcaption><\/figure>\n

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

In our museum collections is a small leather wallet with what first appears to be a piece of clear framed glass inside. It doesn’t look like much, but this is actually a diffraction grid – used to separate light into it’s component wavelengths – think something along the lines of Pink Floyd’s Dark Side of […]<\/p>\n","protected":false},"author":550,"featured_media":3804,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,17,20],"tags":[],"class_list":["post-3797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-art","category-museums","category-photography"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/posts\/3797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/users\/550"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/comments?post=3797"}],"version-history":[{"count":1,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/posts\/3797\/revisions"}],"predecessor-version":[{"id":6197,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/posts\/3797\/revisions\/6197"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/media\/3804"}],"wp:attachment":[{"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/media?parent=3797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/categories?post=3797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.dundee.ac.uk\/culture\/wp-json\/wp\/v2\/tags?post=3797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}