{"id":5450,"date":"2026-08-07T06:55:35","date_gmt":"2026-08-06T21:55:35","guid":{"rendered":"https:\/\/www.aem.imr.tohoku.ac.jp\/?p=5450"},"modified":"2026-08-07T06:55:35","modified_gmt":"2026-08-06T21:55:35","slug":"jem-2100plus%ef%bc%9a%e7%85%a7%e5%b0%84%e7%b3%bb%e8%aa%bf%e6%95%b4","status":"publish","type":"post","link":"https:\/\/www.aem.imr.tohoku.ac.jp\/en\/jem-2100plus%ef%bc%9a%e7%85%a7%e5%b0%84%e7%b3%bb%e8%aa%bf%e6%95%b4\/","title":{"rendered":"JEM-2100plus: Illumination System Alignment"},"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

💡 Basic axis alignments are assumed to have been completed by the administrator.<\/p>\n\n\n

BRIGHTNESS Adjustment<\/h3>\n\n\n
    \n
  1. [PANEL-L : BRIGHTNESS] Brightness adjustment\n
      \n
    1. Turn it fully clockwise once (maximum excitation\/alarm sounds), then return it counterclockwise (converge).\n
        \n
      1. Clockwise: CL3 excitation strengthens: Focal length shortens\n
          \n
        1. When turned fully, the beam diverges (becomes darker).<\/li>\n<\/ol>\n<\/li>\n\n\n
        2. Counterclockwise: CL3 excitation weakens: Focal length lengthens\n
            \n
          1. When turned fully, the beam diverges (becomes darker)<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n\n\n\n
          2. Brightness: Coarse\/Fine adjustment selection\n
              \n
            1. [PANEL-L : BRIGHTNESS: CRS] While selected, the backlight turns on and the changing speed becomes x16.<\/li>\n<\/ol>\n<\/li>\n\n\n\n
            2. Brightness confirmation\n
                \n
              1. Confirm visually on the screen<\/li>\n\n\n
              2. [TC: TEM System Task Bar : SCREEN]<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n

                Beam Centering<\/h3>\n\n\n
                  \n
                1. [PANEL-R : STD FOCUS] Recall objective lens reference current\n
                    \n
                  1. Just in case<\/li>\n<\/ol>\n<\/li>\n\n\n\n
                  2. [PANEL-L : BRIGHTNESS] Converge the beam on the fluorescent screen.<\/li>\n\n\n\n
                  3. [PANEL-L : DEF\/STIG : BRIGHT TILT] Select bright field illumination mode<\/li>\n\n\n\n
                  4. [PANEL-L\/R: SHIFT-X\/Y] Move the beam to the center of the fluorescent screen with Beam Shift<\/li>\n<\/ol>\n\n\n

                    Condenser Lens Astigmatism Correction<\/h3>\n\n\n
                      \n
                    1. [PANEL-L : BRIGHTNESS] Converge the beam on the fluorescent screen.<\/li>\n\n\n\n
                    2. [PANEL-L : DEF\/STIG : COND STIG] Select condenser lens astigmatism adjustment mode<\/li>\n\n\n\n
                    3. [PANEL-L\/R: DEF\/STIG-X\/Y] (Cond STIG) Make the spot shape closer to a perfect circle.<\/li>\n<\/ol>\n\n\n

                      SPOT SIZE \/ \u03b1 Selection (TEM Mode)<\/h3>\n\n\n