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3-7 Adjust field diaphragm
Field diaphragm can strength the image
contrast by preventing the diameter of bean of
light into condenser and in order to strength
the image contrast. When the image is in the
edge of field, the objective can bring out the
supper image.
⑴
Turn the pole
②
for field diaphragm
adjusting to the most left with counter
clockwise to make the field smallest. (Fig 17)
⑵
Through the eyepieces, here you can find
the image of field diaphragm.
⑶
Adjust the both centering screws
①
of
field diaphragm to make the diaphragm image
to the center.
⑷
Open the field diaphragm slowly, if the
field inscribed with its image, it indicates the
diaphragm centered. (Fig 18)
⑸
Please increase the diaphragm a little
during operation to make the field excircle
with its image.
3-8 Adjust aperture diaphragm
Aperture diaphragm controls the aperture
of
illumination.
The
aperture
of
illumination should be suitable with
objective’s, then it can provide the best
image and increase depth of field.
The adjustment of aperture diaphragm is
the same as field diaphragm. Please use
knob
①
.
Please
adjust
aperture
diaphragm to suitable through the contrast
of image. (Fig. 19)
A13.0905
Fig.17
Fig.19
Fig.18
