Nexcope NIB620 - Page 63

63
NIB630
4
D
1
4
2
3
5
Illustration 55 D: NIB630 - Settings on observationtubus.
4a
4b
4c
4d
2
3
1
5
E
Illustration 55 E: NIB630 - Centering the condenser.
Focus on the sample: Look into the eye-
pieces (1) and turn the coarse focusing knob
(2) until the image of the sample is in focus.
Then turn the fine focusing knob (3) to adjust
the focus precisely.
Diopter adjustment: Look through one of
the eyepiece (1) and focus the image (eye-
piece freely selectable). Then look through
the other eyepiece with the other eye and
turn only the diopter adjustment ring (4) on
this eyepiece to focus the sample.
Adjust interpupillary distance: Look
through the eyepieces (1) and adjust the in-
terpupillary distance (5) so that the left and
right fields of view are completely aligned.
For further explanations, see
chapter 4.3.4. and 4.3.5.
Centering the condenser
Turn the field diaphragm lever (1) all the
way to the right to close the field diaphragm
completely. Look through the eyepieces (2).
Turn the condenser up-down knob (3) to adjust
the height of the condenser so that the image
of the field diaphragm shows a sharp outline.
If the condenser is out of center, you will see
an image of the iris opening similar to (4a).
In order to center the iris opening in the field of
view, use the two condenser centering screws
(5) at each side of the condenser holder.
Once the image is in focus and centered in the
field of view (4b), open the field diaphragm
until the image is at least as large as field of
view (4c-4d).
For further explanations see chapter
4.4.2.