Leica DMLB Bedienungsanleitung Seite 15

ICT condenser prisms
Insert the ICT condenser prisms K
(11.3a) into the large holes (11.3b) as follows:
a) Turn back the centering screws slightly (11.8)
with the 2 mm key (2.3 or 2.6).
b) Prism labelling upwards, the name K
(11.5) must be near the marker dot (11.4) on
the edge of the hole (ICT [transmitted light
interference contrast] will not be possible if
the prism is inserted rotated by 180°!).
c) The 2 catches on the underneath of the prism
must click exactly into the guide slit (11.6).
d) Screw in the centering keys slightly (11.8),
checking that all prisms can be moved
properly in direction and are close to the
lower edge of the hole.
Labelling
, K etc. Remove self-adhesive labels, e.g. BF, DF, etc.
2 3
from the backing film with the aid of a small
knife or a needle and stick on to the smooth
areas on the outer edge of the disc as follows:
a) On the opposite side (i.e. on the other side of
the axis of rotation) from the light ring or
prism.
b) So that the lettering is not upside down when
. . .
2
read.
c) For IC prisms: as the same prism may be
used for one or several objectives, find out
from the optics objective data sheet for
which objectives the particular prism can be
used, e.g. only for 10x objective (in the case
of PL FLUOTAR
PLAN).
Before fitting the disc into the condenser, make
sure that neither of the centering screws (11.8)
is sticking out at the side.
Fig. 13 Special darkfield condensers
1 Upper part (dry), 2 Lower part, 3 Orientation pin, 4 Upper
part (oil immersion)
1
2
3
®
) or for 10x and 20x (for N
4
15