23
IX73
4-4 Observation Tube
a
b
While looking through the eyepieces, adjust the binocular vision
until the left and right fields of view coincide completely. The index
dot · indicates the interpupillary distance.
} Note your interpupillary distance so that it can be quickly duplicated
} The diopter adjustment makes it possible to reduce the specimen
focusing error even after the objective is switched. As the diopter
varies between individuals, the diopter adjustment is required for
each person.
The eyepiece with diopter adjustment ring should always be
inserted into the observation tube without the diopter adjust-
ment ring.
Set the diopter adjustment rings on both sides to scale “0”.
Engage a high-power objective (e.g. 40X) in the light path, look into
the right eyepiece with your right eye, and bring the sample into
focus using the coarse/fine adjustment knob.
} Do not use an immersion objective.
Engage a low-power objective (e.g. 10X) in the light path, rotate only
the right diopter adjustment ring
a
to bring the sample into focus.
At this time do not touch the coarse/fine adjustment knob.
Looking into the left eyepiece with your left eye, rotate only the left
diopter adjustment ring
b
to bring the sample into focus.
} The above procedure adjusts the diopter with reference to the right
eye, but it is also possible to adjust with reference to the left eye. In
this case, read the above procedure by inverting “right” and “left.”
Using an eyepiece including a micrometer disk
Looking through the eyepiece with micrometer disk, turn the diopter
adjustment ring
b
so that the micrometer in the field of view is
sharply visible.
Looking through the eyepiece with micrometer disk, focus on the
sample using the coarse/fine adjustment knob so that both the
micrometer and sample are sharply visible.
Looking through the other eyepiece, turn only the diopter adjust-
ment ring
a
to focus on the sample.
CAUTION
1
2
3
4
1
2
3
1
Adjusting the Interpupillary Distance
2
Adjusting the Diopter
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