Checking Phase Contrast Rings - Leica DM2000 Operating Manual

7.3 Checking Phase Contrast Rings

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 centered in the
factory. However, the centering should be
rechecked.
Note:
A light ring slide which is inserted into the side
of the condenser is used for condensers without
condenser disks. Centering is not required in
this case.
Note:
When swiveling in a suitable objective for
phase contrast, the corresponding light ring
must be chosen.
The objective engraving (e.g. PH 1) indicates the
corresponding light ring (e.g. 1).
Fig. 36 Focusing Telescope
1 Adjustable eye lens
2 Clamping ring for fixing the focus position
• In the place of an eyepiece, insert the focus-
• Swivel in the phase contrast objective with
• Focus on the specimen with the focus wheel.
• Focus the ring structure (37.a) by slightly loos-
• Retighten the clamping ring.
• Select the corresponding ring diaphragm
• If the light ring and the phase ring are not
Fig. 37
PH=phase contrast ring, LR=light ring
a Condenser in brightfield (BF) position
b Condenser in phase contrast (PH) position
c Light ring and phase ring centered
1
2
ing telescope (Fig. 36) into the observation
tube.
the lowest magnification.
ening the clamping ring (36.2) and moving the
eye lens (36.1).
(light ring) in the condenser.
shown as arranged in Fig. 37.c, the light ring
must be centered.
Phase Contrast Centering Procedure
Light ring (LR) not centered
a b
PH
7. Start-up
c
LR
33