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Troubles
Field of view is cut off, or
illuminated irregularly.
Causes
The nosepiece is not changed properly.
Remedies
Slightly rotate the nosepiece until it
clicks into position.
2. Troubles in optical system:
The centre of the bulb is not
coincidence with the centre of the
objective.
There are dust or dirt on the glass
surface of the lenses.
Position the bulb correctly.
Remove the dust and dirt.
Dust and dirt is visible in
the field of view.
The condenser is too low.
Raise the condenser up.
Image quality is poor:
insufficient contrast and
image details lack
definition.
There is no cover glass on the slide.
Put the cover glass on the slide.
The top lens of the objective is dirty.
Clean it.
Immersion objective is used without
immersion oil.
Apply immersion oil.
There are bubbles in the immersion oil. Drive the bubbles out.
Special immersion oil is not used.
Use the special immersion oil.
The diameter of the iris diaphragm is too
large or small
.
The condenser is not correctly
positioned in the light path or inclined.
Position the condenser.
One side of the viewing
field is dark
.
Image moves while
focusing
The specimen is not caught stably by
the clamp.
The image is yellow.
Blue filter is not used.
The viewing field is too
dark
.
P.8
Remove the dust and dirt.
There are dust or dirt on the specimen
surface.
There are dust or dirt on the glass
surface of the lenses.
Remove the dust and dirt.
The cover glass is too thick or thin.
Choose the cover glass 0.17mm thick.
The specimen is mounted on the stage
upside down.
Reverse the specimen.
There are dust or dirt on the glass
surface of the lenses.
Remove the dust and dirt.
There are dust or dirt on the surface of
the prisms.
Remove the dust and dirt.
Adjust the diameter of the iris
diaphragm
.
The condenser is too low.
Raise the condenser up.
Slightly rotate the nosepiece until it
clicks into position.
The objective is not correctly positioned
in the light path.
The clamp is not fixed stably.
Fix the clamp stably on the stage.
Slightly rotate the nosepiece until it
clicks into position.
The objective is not correctly positioned
in the light path.
Catch the specimen stably.
Apply the blue filter.
The diameter of the iris diaphragm is too
small
.
Adjust the diameter of the iris
diaphragm larger
.
The condenser is too low.
Raise the condenser up.
There are dust or dirt on the glass
surface of the lenses.
Remove the dust and dirt.
