Filters - Leica DM R Serie Mode D'emploi

Light filters*
Light filters can be built into the intermediate
filter holder (Fig. 9, filter diameter 50 mm), the
filter box (Fig. 10, Ø 32 mm) or can be placed on
the dust protection glass of the microscope
base (27.3). Filters should not be used between
the polarizer and the specimen in polarized light
and ICT interference contrast (possibility of
birefringence due to strain caused by heat).
Besides the standard filters listed below there
are also various special filters, Optics data
sheet and interference filters for measurement
purposes, e.g. the MPV microscope photometer.

Filters

Application
Grey filter Grey filters (neutral density filters)
are used to attenuate light with-
out influencing the colour tem-
perature. The engraved value, e.g.
N16, indicates the attenuation
value. N 16, therefore, means
reduction to 1/16 = 6.3 % trans-
mission.
Integrated grey filters can be
switched: in the microscope base
(48.23) (T = 6.3 %),
in the RF reflected light dia-
phragm module (23.5), T = 5%,
in the empty slot of the analyser
360 (30.4) T = 25%,
Various grey filters can also be
inserted at the places described.
56
Green filter, Contrast enhancement for black-
panchromatic and -white photography.
DLF 2 (blue) Conversion filters for colour
photography with daylight film.
ALF dto. for artificial light film.
BG 20 Highlights red in Polaroid expo-
sures.
VG 9 Contrast enhancement for chro-
(green filter) mosome photographie.
546 nm Pol compensator measurements,
interference interference attachments.
filter
BG 38 Suppression of red in fluorescence
(blue filter) (is integrated in diaphragm mod-
ule F (23.8).
Diffusing For more homogeneous illumi-
screen nation at objective magnification
1.6x and conoscopy and incident
light pupil illumination.
Grooved Lamphousing 252 with 150 W
diffusing Xe lamp.
screen