Video summary

Penggunaan mikroskop cahaya binokuler

Main summary

Key takeaways

Educational

Main Ideas / Lessons

  • The video demonstrates how to use a binocular light microscope (a microscope with two eyepieces), emphasizing the correct setup of:
    • Eyepiece spacing
    • Light and diaphragm settings
    • Objective lens selection
    • Focusing using coarse and fine focus knobs
  • It provides a step-by-step workflow for viewing a stained tissue specimen (skin) using progressively stronger objectives.
  • It highlights a special handling step when using a 100× objective lens, including applying immersion oil, and then returning the microscope to a safe/standard position afterward.

Methodology / Instructions (Step-by-Step)

1) Initial Setup

  • Set the binocular eyepiece distance to match your eyes.

2) Turn on and Set Illumination

  • Turn on the microscope using the power/on button.
  • Set the light to maximum intensity initially to ensure adequate illumination.
  • Open the diaphragm to allow more light.
  • Confirm that light is entering through the condenser lens.

3) Select the Correct Starting Objective

  • Start with the smallest objective lens.
  • If the smallest objective is not in place:
    • Use the lens turner to rotate objectives until the smallest objective clicks into position.
    • Wait for the click sound to confirm it is locked properly.

4) Place and Secure the Specimen

  • Put the prepared slide (specimen stained with hematoxylin-eosin) on the stage.
  • Open the stage clamp, place the slide under it, then release the clamp.
  • Ensure the slide is fixed and won’t slide.

5) Center the Specimen Under the Objective (X–Y Movement)

  • Adjust the stage using the X and Y axes until the target region (e.g., the pink/purplish staining) is under the objective lens.

6) Focus the Image

  • Use the coarse focus knob (macrometer) first:
    • Move the stage close to the objective while looking through the eyepieces until a focused shadow/image appears.
  • If the focus is not sharp enough:
    • Use the fine focus knob (micrometer) gradually until the image is most focused.

7) Adjust Light Intensity for Clarity

  • If the image is too bright, reduce illumination by adjusting light intensity.
  • Use diaphragm/illumination adjustment so the light is sufficient but not overwhelming.

8) Scan the Whole Slide

  • With the smallest objective, scan the entire preparation using the X–Y controls.

9) Switch to Higher Magnification Objectives

  • Rotate the objective lens dial to a stronger objective:
    • Rotate until it clicks/locks in place.
  • Re-check focus:
    • Adjust focus again with the coarse/fine focus knobs as needed.
  • For even more detail:
    • Repeat the objective change to higher power (the subtitles mention increasing to about 40×, and also reference 45× in the process).
  • Note on stage movement at higher power:
    • Subtitles indicate you may avoid lowering the stage first (by immediately rotating the objective without using macrometer), then re-focus appropriately.

10) Use the 100× Objective Correctly (Immersion Oil)

  • For the 100× objective lens:
    • Apply immersion oil (subtitles reference “MRC oil energy oil”).
  • After finishing with 100×:
    • Return the objective to its original lower-power position using the lens turner until the 100× objective is disengaged.
    • Use the coarse focus knob (macrometer) to lower the stage so it is far from the objective.
    • Turn off the light.
    • The slide can then be returned/handled as needed.

Speakers / Sources

  • Yustina Andriani Dwi (Faculty of Medicine, Public Health, and Nursing, UGM)

Original video