Leica DM R Serie Mode D'emploi page 102

Diapositive overlay
The diapositive overlay device (Fig. 66) is used
to reflect measurement and comparison masks,
µm marks, marker arrow, company logo, charge
and quality data, etc. into the microscope image
so that they can be recorded together with the
image. Only with tube HC FSA 25 PE and with
DM RD (Fig. 31 and 33)!
The following diapositives are available:
Marker arrow
10 mm measurement scale with 100 divisions
µm marks for 2.5x – 100x objectives
10 x 10 mm grid division in 100 fields
Test circle and measured length for grain size
measurements
Picture series for ASTM-E 112 grain size
measurements.
Individual masks with any measurement and
comparison patterns, quality data, company
logos etc. can be made by the user.
Fig. 66a Diapositive overlay device on the HC FSA 25 PE tube
1 Tube flange, 2 Coupling ring for reflection optics, 3 Reflec-
tion optics, 4 Coupling ring for diapositive overlay device,
5 Knurled ring for focusing, 6 5 x 5 cm slide frame, 7 Filter slot,
8 Illumination tube of lamphousings
1 2 3 4 5
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6 7 8
To do this, the original must be photographically
reproduced on a 35 mm negative, i.e. bright lines
on a dark background and framed in a standard
50 x 50 mm slide frame. The best film to use is
fine-grain "document film".
The diapositive is imaged in the intermediate
image plane of the microscope at a scale of 2 : 1.
A distance of e.g. 5 mm in the diapositive overlay
is magnified to 10 mm in the intermediate image
plane of the microscope. The overlay device
only works when the beamsplitter in the tube
(31.4) is set at 50/50 (switch rod in middle
position). The framed diapositive is inserted in
the integrated holder (66.6) (white side of
diapositive with lettering facing microscope).
Fig. 66b Transformer