{"id":5447,"date":"2026-08-07T06:55:35","date_gmt":"2026-08-06T21:55:35","guid":{"rendered":"https:\/\/www.aem.imr.tohoku.ac.jp\/?p=5447"},"modified":"2026-08-07T06:55:35","modified_gmt":"2026-08-06T21:55:35","slug":"jem-2100plus%ef%bc%9a%e5%af%be%e7%89%a9%e3%83%ac%e3%83%b3%e3%82%ba%e3%81%ae%e9%9d%9e%e7%82%b9%e5%8f%8e%e5%b7%ae%e8%a3%9c%e6%ad%a3","status":"publish","type":"post","link":"https:\/\/www.aem.imr.tohoku.ac.jp\/en\/jem-2100plus%ef%bc%9a%e5%af%be%e7%89%a9%e3%83%ac%e3%83%b3%e3%82%ba%e3%81%ae%e9%9d%9e%e7%82%b9%e5%8f%8e%e5%b7%ae%e8%a3%9c%e6%ad%a3\/","title":{"rendered":"JEM-2100plus: Objective Lens Astigmatism Correction"},"content":{"rendered":"\n

Note: This page was translated by AI from the Japanese original. In case of any discrepancy, the Japanese version shall prevail.<\/em><\/p>\n\n\n\n

Original post date (Japanese version): June 22, 2024<\/em><\/p>\n\n\n\n

💡 This page is a quick manual for the JEM-2100plus.\nThe contents are subject to change.\nPlease receive training in advance before actually using the equipment.<\/p>\n\n\n

    \n
  1. In image observation mode<\/strong><\/span><\/li>\n\n\n\n
  2. [PANEL-R : MAG\/CAM L] Magnification setting<\/strong><\/span> (Low\/Medium mag: x20K~ \/ High mag: x100K~)<\/li>\n\n\n\n
  3. Beam centering<\/strong><\/span><\/li>\n\n\n\n
  4. Brightness adjustment<\/strong><\/span>\n
      \n
    1. [PANEL-L : BRIGHTNESS] Brightness easy for observation: Expand the beam to about the same size as the screen<\/li>\n<\/ol>\n<\/li>\n\n\n\n
    2. Focusing (Coarse\/Fine)<\/strong><\/span>\n
        \n
      1. [PANEL-R : STD FOCUS] Recall reference current<\/li>\n\n\n
      2. [PANEL-R : Z\u25b3\u25bd] Specimen height (Z) adjustment: Lower the contrast to the minimum<\/li>\n\n\n
      3. [PANEL-R : OBJ FOCUS] Adjust to an easy-to-see focus near the true focus<\/li>\n<\/ol>\n<\/li>\n\n\n\n
      4. Astigmatism correction<\/strong><\/span>\n
          \n
        1. Medium\/Low magnification (x20K~)\n
            \n
          1. Observe near a hole in the film<\/li>\n\n\n
          2. [PANEL-L : DEF\/STIG : OBJ STIG] Select objective lens astigmatism adjustment mode<\/li>\n\n\n
          3. [PANEL-R : OBJ FOCUS] Make it overfocus to display Fresnel fringes<\/li>\n\n\n
          4. [PANEL-L\/R: DEF\/STIG-X\/Y] Adjust so that the Fresnel fringes become isotropic<\/li>\n<\/ol>\n<\/li>\n\n\n
          5. High magnification (x100K~)\n
              \n
            1. Observe an amorphous region (such as a support film)<\/li>\n\n\n
            2. [PANEL-L : DEF\/STIG : OBJ STIG] Select objective lens astigmatism adjustment mode<\/li>\n\n\n
            3. [PANEL-R : OBJ FOCUS] & [PANEL-L\/R: DEF\/STIG-X\/Y]\n
                \n
              1. Confirm that the image flows from overfocus <> underfocus<\/li>\n\n\n
              2. Adjust so that the image flow is minimized<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n

                💡 Astigmatism correction on the screen (especially on the large fluorescent screen) requires practice, so normally use the camera.\nYou may use binoculars and the small fluorescent screen, but using the camera + FFT is easier.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n\n

                *This post was created by an AI agent.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

                Note: This page was translated by AI from the Japanese original. In case of any discrepancy, the Japanese version shall prevail. Original post date (Japanese version): June 22, 2024 💡 This page is a quick manual for the JEM-2100plus. The contents are subject to change. Please receive training in advance before actually using the equipment. … JEM-2100plus: Objective Lens Astigmatism Correction<\/span><\/a><\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"https:\/\/www.aem.imr.tohoku.ac.jp\/?p=3206","footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-5447","post","type-post","status-publish","format-standard","hentry","category-uncategorized","en-US"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/posts\/5447","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/comments?post=5447"}],"version-history":[{"count":4,"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/posts\/5447\/revisions"}],"predecessor-version":[{"id":5756,"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/posts\/5447\/revisions\/5756"}],"wp:attachment":[{"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/media?parent=5447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/categories?post=5447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.aem.imr.tohoku.ac.jp\/wp-json\/wp\/v2\/tags?post=5447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}