Leica DM1000 Mode D'emploi page 30

7. Start-up
• In the place of an eyepiece, insert the focus-
ing telescope (Fig. 27) into the observation
tube.
• Swivel in the phase contrast objective with
the lowest magnification.
• Focus on the specimen with the focus wheel.
• Focus the ring structure (29.a) by slightly loos-
ening the clamping ring (27.2) and moving the
eye lens (27.1).
• Retighten the clamping ring.
• Select the corresponding ring diaphragm
(light ring) in the condenser.
• If the light ring and the phase ring are not
shown as arranged in Fig. 29.c, the light ring
must be centered.
• Insert the centering screws into the openings
provided at the rear of the condenser (28.1).
Fig. 27 Focusing telescope
1 Adjustable eye lens
2 Clamping ring for fixing the focus position
30
• Turn the centering screws until the dark ring
• Repeat the process for all other light rings.
• Remove the centering keys after the centering
Fig. 28
1
Fig. 29
PH=phase contrast ring, LR=light ring
a Condenser in bright field (BF) position
b Condenser in phase contrast (PH) position
c Light ring and phase ring centered
1
2
(phase ring in the objective) is congruent with
the slightly narrower bright ring (light ring in
condenser) (29 c).
procedure.
Light ring centering (i.e.: condenser UCL/P)
Centering keys
1
Phase contrast centering procedure
Light ring (LR) not centered
a b
PH
1
c
LR