KERN Optics OBE 1, User Instructions

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21 OBE-1-BA-e-1611
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 you have to remove the microscope head at first. Then the analyser has to
be inserted into the round aperture of the beam path right above the nose piece.
The polariser on the other hand is only placed on the field lens.
There are two points to take into account when subsequently using the polarisation
unit:

The aperture setting of the condenser must be at the maximum (lever
completely on the left side).

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).
8.2 Dark field unit
There is the following way to carry out dark field applications.
1. A dark field attachment with an integrated black disk can be
screwed into the standard condenser of the microscope
from below
(see right illustration) . Please take note of the
instruction delivered with the dark field attachment.