Leica DMLS, Instructions Manual

Page: 44 / 160

44
Examp le:
The upper and lower surfaces of a thin polished
specimen have been focused with a dry
objective (n
i
= 1.0), scale readings of the mecha-
nical fine drive (division spacing = ca. 3
µ
m):
18.5 and 12.5.
Therefore d’ = 6 x 3 = 18
µ
m.
The refractive index of the object detail was
taken to be n
o
= 1.5.
Thickness d = 6 x 3 x 1.5 = 27
µ
m.
Object marker
The object marker is screwed in place of an
objective (not illustrated). When rotated, a
diamond is lowered onto the coverglass or
object surface, where circles of variable radii
can be scribed to mark objects.
TV microscopy
Various adapters are available for the connec-
tion of TV cameras (Fig. 34).
Cameras with c-mount and B-mount objective
thread
The c-mount adapters listed in the following
table can be used on all trinocular phototubes.
The picture area on the monitor depends on the
adapter used and on the chip size of the camera.
The photo adapter tube (34.4) is necessary for
HC FSA and HC 1TP tubes.
Recorded picture diagonal (mm) with
1 inch 2 /
3
inch 1 /
2
inch 1 /
3
inch
camera camera camera camera
Without zoom magnification:
c-mount-adapter 1x HC 16 11 8 6
c-mount-adapter 0.63x HC – 17.5 12.7 9.5
c-mount-adapter 0.5x HC – – 16 12
c-mount-adapter 0.35x HC – – – 17.1
c-mount-adapter 4x HC 4 2.8 2 1.5
With zoom magnification (Vario TV adapter):
c-mount, 0.32 – 1.6x HC – – 19
+)
– 5 18 – 3.8
B-mount, 0.5 – 2.4x HC – – 16 – 3.3 –
B-mount, 0.5 – 2.4x HC – – – 12 – 2.5
+) from zoom factor 0.42x only !
Fig. 34 C-mount adapter on trinocular tube
1 TV camera, 2 Adapter with c-mount thread, 3 Clamp screw, 4 Photo adapter tube
3
4
1
a
3
4
1
2
v
b