Leica DM R Serie Mode D'emploi page 36

In the opened upper part of the stand there are 3
stop points (22.7), with corresponding points in
the tube module and in the incident light module.
Carefully pull the tube module forwards and
simultaneously to the right to ensure that there
is precise fitting at these three points. Carefully
tighten the 4 fixing screws.
The following versions of the tube optics are
available:
Tube optics HC E
With tube factor 1x
For brightfield, darkfield, interference contrast
ICT and ICR, polarization contrast, fluorescence.
An auxiliary telescope (51.1) with adapter (51.3) is
also required for phase contrast, but for this the
tube optics HC B (or HC V) with Bertrand lens is
recommended.
Tube optics HC B with Bertrand lens
With tube factor 1x, engagable and focusable
Bertrand lens.
Specially for the adjustment of darkfield, phase
and interference contrast and for survey
observation (p. 65) and observation of very fine
bores. For all other techniques, including
polarization contrast, but not for quantitative
polarization microscopy (42.2 and 50.2).
Tube optics HC V:
Magnification changer with Bertrand lens
With tube factors, 1x, 1.25x, 1.6x and focusable
Bertrand lens (adjustment DF, PH, ICT and for
survey observation), see p. 64.
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Tube optics HC P 1x/1.6x with Bertrand lense
With tube factor 1x, switchable to 1.6x,
engagable focusable and centerable Bertrand
lens. Iris diaphragm in intermediate image for
isolation of small grains (15 µm for 100x
objective). Specially for polarized light micro-
scopy, but can also be used for all other
techniques (54.1, 54.2; 58), see p. 77.
Integrated depolarizing quartz plate: prevents
the formation of interference colours due to
polarization effects of tube prisms (pseudo-
dichroism) when the analyser is disengaged and
the polarizer engaged. Only effective with tube
factor 1x, however. Not for spectral photometry.
When using tube factor 1.6x, remember that at
high objective magnifications and apertures the
useful magnification (objective aperture x 1000)
may be exceeded, causing blurred images.
Quartz plate inactive.
Tube module HC L 4/25
Without tube optics, only for adaption of HC L
tubes from the DM L microscope range in which
the tube optics are integrated.