{"id":12140,"date":"2018-03-24T14:19:42","date_gmt":"2018-03-24T18:19:42","guid":{"rendered":"https:\/\/acornabbey.com\/blog\/?p=12140"},"modified":"2018-03-24T16:10:06","modified_gmt":"2018-03-24T20:10:06","slug":"episcopic-illumination","status":"publish","type":"post","link":"https:\/\/acornabbey.com\/blog\/?p=12140","title":{"rendered":"Episcopic illumination"},"content":{"rendered":"
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Two letters of the word “LIBERTY” on an American 25-cent piece, magnified 60x<\/em><\/center><\/p>\n
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Two years ago, I wrote a post, with photos, about my Nikon Model S microscope<\/a>. People who are Googling for this classic microscope often find my post, and it has been quite popular. In 2016, I did not have an “episcopic illuminator” for the microscope. I recently bought one on eBay. These devices for Model S microscopes seem to be fairly rare and don’t come up for sale often — at least not at a decent price.<\/p>\n

An episcopic illuminator is a device that lights the specimen from above. What you see in the microscope is light reflected from<\/em> the specimen. The opposite of this is “diascopic” illumination. In diascopic illumination, the light is below the specimen. What you see in the microscope is light that is transmitted through<\/em> the specimen.<\/p>\n

As you might imagine, both types of illumination are sometimes used together.<\/p>\n

Somehow, my Nikon D2X camera seems to have infected me with a fetish for optics. Like my Nikon D2X camera, the Nikon Model S microscopes are now considered largely obsolete by professionals. But collectors and hobbyists snap them up for their quality and their continuing usefulness.<\/p>\n

Unfortunately, the through-the-microscope photos here are of poor quality, because they were shot with an iPhone held over the microscope’s eyepiece.<\/p>\n

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⬆\ufe0e The episcopic illuminator is the attachment on the left with the lettering “Nikon \/ 69368 \/ 1.5x.” Similar illuminators are an option on many microscopes.<\/em><\/center><\/p>\n

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⬆\ufe0e The lamp below the microscope stage is a diascopic illuminator.<\/em><\/center><\/p>\n

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⬆\ufe0e This is a blade of grass, with both episcopic and diascopic illumination, showing the barbs on the edge that can irritate or even cut tender skin<\/em>.<\/center><\/p>\n
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Two letters of the word “LIBERTY” on an American 25-cent piece, magnified 60x Two years ago, I wrote a post, with photos, about my Nikon Model S microscope. People who are Googling for this classic microscope often find my post, and it has been quite popular. In 2016, I did not have an “episcopic illuminator” … Continue reading “Episcopic illumination”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,16],"tags":[40],"class_list":["post-12140","post","type-post","status-publish","format-standard","hentry","category-photography","category-technology","tag-nikon-model-s"],"_links":{"self":[{"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12140","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12140"}],"version-history":[{"count":22,"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12140\/revisions"}],"predecessor-version":[{"id":12168,"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/12140\/revisions\/12168"}],"wp:attachment":[{"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/acornabbey.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}