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Chapter 3 Detailed Explanation
83
Handling of the immersion oil
•
Use a minimum quantity of oil. If too much oil is applied, surplus oil may flow out onto the stage and the
condenser and degrade performance.
•
Any oil residue left on the lenses of oil-immersion type objectives or adhesion of oils on the front lens of
dry type objectives will degrade image quality. After completing oil-immersion observation, be sure to
clean the objective, condenser, and any other parts that may be stained by oil.
•
To wipe surplus oil on the front of the condenser lens, remove the condenser.
•
Use petroleum benzine to wipe off oil and finish with absolute alcohol (ethyl or methyl alcohol). If
petroleum benzine is not available, use methyl alcohol instead. In that case, wipe off the oil several times
as the detergency of methyl alcohol is weaker than petroleum benzine. (You can wipe off the oil generally
3 to 4 times.)
•
When handling petroleum benzine and absolute alcohol, be sure to follow the instructions described in “4.
Handling flammable solvents” in “ WARNING” at the beginning of this manual.
•
Close the oil container cap tightly after use. Make sure that the cap is closed tight after refilling the
container. Check the cap periodically to make sure it has not come loose, allowing oil to leak out.
•
Do not press the container hard. Oil may splash out.
•
If you find an oil drips around the container, wipe them off.
•
Avoid contact of immersion oil with eyes or skin. In the event of contact with eyes or skin, take one of the
following measures although Nikon immersion oil does not contain any toxic ingredients.
Contact with skin:
Rinse your skin thoroughly with soap and water.
Contact with eye:
Rinse your eye thoroughly with water (more than 15 minutes) and see a doctor.
•
Do not leave immersion oil in the sun (ultraviolet rays may damage it).
3.4.3 Performing
Water-Immersion
Microscopy
The “WI” or “W” mark on the side of an objective indicates that it is a water-immersion-type objective. When
using such an objective, perform water immersion (using distilled water or physiological saline) between the
specimen and the front of the objective. Operate the microscope in the same way as for oil immersion.
Because water evaporates easily, make sure that the water is still present during observation. Beware that
using large amounts of water might cause the water to overflow into the stage or condenser, causing
corrosion.
Cleaning up moisture
After using the microscope, wipe any moisture off the surface of the objective. Then, perform a finishing
wipe with absolute alcohol.
If evaporated moisture leaves a stain, gently wipe off the stain using a small amount of neutral detergent.
Then, finish cleaning the surface by performing a finishing wipe with absolute alcohol.