Metallurgical microscope calibration steps, you deserve to know
1. Adjust the direction of the metallographic microscope and the light source so that the light source is aligned with the flat collecting mirror of the metallographic microscope, but at least 10 inches away.
2. Adjust the light so that the filament can be clearly focused on the flat condenser.
3. Adjust the mirror so that the light is transmitted from the center of the condenser mirror to the condenser mirror under the stage.
4. Place a glass slide on the stage, move the condenser down and align it with the specimen, and focus from low magnification to high magnification.
5. Focus clearly on the slide specimen. The condenser may need to be raised slightly to get adequate illumination.
6. Close the aperture on the light source to the minimum. Carefully turn the condenser lens assembly under the stage up (or down) until the reduced aperture is focused on the same plane as the glass slide. Do not focus on the metallographic microscope itself at this stage (i.e. do not move the knobs above the stage).
7. If your metallographic microscope has the function of focusing the condenser, you can adjust the condenser to the center of the field of view by moving the image that reduces the aperture (this action is required for most research metallographic microscopes you can use). Move the aperture to the center of the field of view).
8. Open the aperture ring until the illumination polygonal aperture ring just fills the field of view.
9. If possible, remove one eyepiece. Close the iris aperture of the condenser under the stage and look into the tube to observe the object lens. The light should now appear symmetrical. In a research metallographic microscope, we can adjust for any asymmetry at this stage.
10. Open or close the iris aperture on the condenser under the stage so that only 2/3 of the field of view of the objective lens is illuminated. Replace the eyepiece. At this point, the system calibration is completed and the metallographic microscope is ready for microscopic examination of the slides.
11. When using low magnification, medium magnification and oil lenses, some compromises must be made. In the metallographic microscope you use, this compromise is to adjust the height of the condenser. You must adjust the light intensity by moving the condenser below the correct height.
12. Do not control the light intensity by moving the condenser, adjusting the iris aperture on the condenser under the stage, or strengthening or weakening the light. The ideal control method is to use a neutral filter (i.e. gray filter).
