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39
6. Startup
If your microscope is equipped for the use of
phase contrast, the light rings that fit the objec-
tives are built into the condenser.
The light rings are already leveled in the factory.
However, the leveling should be rechecked.
Note:
Every objective is assigned its own light ring in
the condenser disc. Therefore, a check must be
performed for each objective. When swiveling in
a suitable objective for phase contrast, the cor-
responding light ring is set automatically.
• Press the BF (Bright Field) button (one of the
variable function keys, behind the focus dials).
PH LR
Fig. 43 Phase contrast centering procedure
PH=phase contrast ring, LR=light ring
a Condenser in bright field (BF) position
b Condenser in phase contrast (PH) position
Light ring (LR) not centered
c Light ring and phase ring centered
• In the place of an eyepiece, insert the focus-
ing telescope (Fig. 42) into the observation
tube.
• Swivel in the phase contrast objective with
the least magnification.
• Focus the ring structure (43a) by slightly loos-
ening the clamping ring (42.2) and moving the
eyelens (42.1).
• Retighten the clamping ring.
• Press the PH (Phase Contrast) button. The ring
diaphragm in the condenser is pivoted in.
• If the light ring and the phase ring are not
shown as arranged in Fig. 43c, the light ring
must be leveled.
Fig. 42 Focusing telescope
1 Adjustable eyelens
2 Clamping ring for fixing the focus position
AB C
1
2