KERN OBN 141, User Instructions

Page: 35 / 43

OBN-14-BA-e-1510 34
8
Using optional accessories
8.1 Polarisation unit
The polarisation unit consists of a polariser and an analyser.
Both consist of a round glass plate with an external holder ring. To mount the
analyser there is a slider with a socket fitted on the front of the microscope directly
below the nosepiece
(see illustration on page 10) , where you can simply insert the
analyser (see left illustration) .
The polariser on the other hand is only placed on the ring holder of the field lens (see
right illustration) .
There are two points to take into account when subsequently using the polarisation
unit:

The aperture setting of the condenser must be in position PH .

For its starting position, the polariser must be turned to the position in which
you can see the highest level of darkness in the field of view (without object
slide).