14
Trouble
Causation
Remedy
Lens (objective, eyepiece,condenser, light
collector) has dust.
Clean it
Position of condenser is too low.
Higher condenser
Image isn’t clear
(contrast or definition isn’t
enough)
Cover glass of specimen doesn’t meet the
requirement.
Use required thickness cover
glass. (0.17mm)
Cover glass of specimen isn’t in up
direction.
Place specimen correctly.
Surface of objective lens is dirty
(especially it is easy for the front lens of
40X objective to dip in immersion oil).
Clean it
Immersion oil isn’t used for 100X
objective (oil).
Use immersion oil
Immersion
oil
doesn’t
meet
the
requirement.
Use immersion oil supplied
by producer.
There is bubble in immersion oil.
Clear the bubble way
Size of iris aperture isn’t proper.
Adjust the size of iris aperture.
Position of condenser is too low.
Readjust the position of
condenser.
One side of image is dark or
image is moving as focusing.
Objective isn’t in correct position.
Make the objective in
correct position.
Specimen isn’t placed correctly.
Place specimen levelly on
stage and clip it with clamp.
Objective touches specimen
as changing low times
objective to high times
objective.
Cover glass of specimen isn’t in up
direction.
Place specimen correctly.
Cover glass doesn’t meet the requirement.
Use required thickness cover
glass. (0.17mm)
Image observed by two eyes
aren’t
in
superposition
entirely.
Interpupilary distance isn’t adjusted
correctly .
Adjust interpupilary
distance according to two
eyes.
It is easy for eyes to be tired
during observing.
Diopter isn’t adjusted correctly.
Readjust diopter
