4.8.2.
The LED illumination in the bright-
field incident light illumination is characterised
that there is no need to do the focusing of the
light guides. Furthermore the power-supply can
be done over the built-in power supply of the
stand or via a transformer 3W-LED.
The complex assembly of the cold-light device
and its light guides is cancelled.
Picture 14: Bright-field incident light illumina-
tion – LED
4.9.
Incident light polarization
4.9.1. A
Polarization filter
in a plug-in
socket, which is plugged in front of the collec-
tor of the 3W-LED incident light illuminator, ex-
actly like the colour filter, serves as the polar-
izer. In case of using a cold light illumination
the polarization filter can be mounted directly
on the focussing attachment of the semi fixed
light guide.
Picture 15: Polarizer
.9.2. There are several variants for the
ana-
A rotating analyzer is set in front of the
4
lyzer
I.
objective and is fastened with a knurled screw.
Picture 16: Rotatable Analyzer
A filter pusher formed like an intermediate
II.
tube includes two parallel-aligned polarization
filters, which can be pushed to the left side in
the path of the light beam with the help of one
of the two knobs. The microscope must not be
refocused when observing with or without a
polarization filter.
Picture 17: Analyser in an intermediate tube
.
The use of the cold light device allows
III
a further variant. A polarizer or analyser which
is mounted in front of the split ring light illumi-
nator allows observations with polarization at
uniform illuminated objects.
19
