Leica DMLB Bedienungsanleitung Seite 35

Focusing
The coaxial controls on each side of the
microscope have a total of 5 functions (→ Fig.
28, p. 38):
Outer knob (28.8), both sides
Fine focusing, 1 scale unit corresponds to 1 µm
vertical travel → p. 59. On some versions of the
microscope, the fine focusing has two steps of
1 µm or 4 µm vertical travel per scale unit. To
switch over: press focusing knob to the left or
right.
Middle knob (28.7), both sides
Coarse focusing, total travel ca. 22 mm. On some
versions of the microscope, the vertical
adjustment range of the stage can be extended
by the clamp on the stage bracket (Allen screw,
right). Microscopes DM LP and LM only: addi-
tional stage height adjustment → special
manual.
Upper stage stop Torque adjustment
Inner, black knurled wheels (28.6 and 28.17)
left: individually adjustable torque of focusing
right: individually adjustable height stop of
focusing.
A stop is set at the current stage position by
Adjustment ↑.
Cancelling the stop: turn the knurled wheel in
the opposite direction ↓.
To adjust torque of the x/y stage movement:
Consult Technical Service!
Setting the tube and eyepieces
For trinocular
beamsplitter only: Set beamsplitter at visual
observation by adjusting the rod (46.4). A key to
the switching positions is given in symbols on
the side of the tube.
tube* with switchable
For eyepieces with inserted graticule* only:
Bring the object greatly out of focus or remove
from the light path and sharply focus the
graticule with a relaxed eye by adjusting the
eyelens (Fig. 18.4). (The easiest way to relax
your eye is to look at a distant object outside the
room for a moment.) Focus the object through
the eyepiece with graticule only. Now close
your eye and focus the object only by adjusting
the second eyepiece.
Only when no graticule is inserted in either
eyepiece:
When adjusting the eyelens you will see a light-
coloured line (18.5) encompassing the basic part
of the eyepiece. This shows the correct position
of the eyelens for people with normal eyesight
and for spectacle wearers looking through the
microscope with corrective glasses.
Glasses with bifocal or progressive lenses must
be removed before looking through the
microscope.
Only when one eyepiece is without an
adjustable eyelens:
Focus the object exactly though this eyepiece
first (close your other eye), then focus the image
again by adjusting the eyelens of the second
eyepiece.
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