Leica DM R Serie Mode D'emploi page 86

Condenser
Imp ortant: Only use the condenser tops
0.90 S 1 or P 0.90 S 1 and P 1.40 OIL. The con-
denser top with long working distance 0.50 S 15
(p. 22) is not designed for ICT work. See pages
25 and 30 for assembly.
Crossing the polarizers
To obtain a good quality ICT image the analyser
must be set exactly at 0 and the p olarizer must
be exactly crossed (extinction p osition)!
Fig. 60 Controls for ICT transmitted light interference contrast
1 Analyser, cf Fig. 30, 2 Stage rotation clamp screw,
3 Condenser top lever, 4 Polarizer rotation clamp, 5 Pola-
rizer index adjustment (cf Fig. 28), 6 Incident light reflector
turret, 7 Objective-side prism turret with fine adjustment,
8 8-position disc for condenser-side Wollaston prisms,
9 Mount for λ or λ/4 compensator (hidden, cf Fig. 27.6)
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Push the analyser (50.1) into the microscope as
far as the second clickstop. The lambda sign (λ)
must be on the underneath (not visible), see also
page 34.
Loosen the analyser clamp (30.6) and adjust so
that the two index marks are exactly opposite
each other. If using the 360° rotatable analyser
(30.1), set the 0° position with the coarse and
fine scale and vernier (30.2 and 30.3), clamp on
back. Retighten clamp.
Turn the objective nosepiece turret (60.7) and
the condenser disc (60.8) to pos. H = brightfield.
The IC prisms are then disengaged. Disengage
the incident light reflector (60.6).
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