KERN Optics OBN 158, User Instructions

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23 OBN-13-BA-e-1510
8.2 Camera connection
Due to the trinocular tube, which is a standard fitting for the whole OBN-13 series, it
is possible to connect microscope cameras to the device, in order to digitally record
images or sequences of images of an object being observed.
After the plastic cover has been removed from the camera adapter connector on the
top of the microscope head, then a suitable adapter must be fitted.
In general there are two C-mount adapters available for this (1x and 0.57x
magnification,
see Chapter 3 Features ). After fitting one of these adapters it can be
fixed with the fixing screw. A camera which has a C-mount thread is then screwed on
top of the adapter.
We recommend that you first adjust the field of view using the eyepieces on the
device for the existing requirements, and then carry out the observation using the
microscope camera (i.e. using the PC screen which is connected).
To do this, the trinocular toggle rod on the righthand side of the microscope head
must be pulled out. The light from the microscope lighting is deflected so that it is
completely in the beam path for the camera, which causes a dark field of view in the
eyepieces. This means that it is not possible to simultaneously observe by the
eyepieces and PC screen.
For C-mount adapters, which have their own integrated magnification, the image
which is shown on the camera connected to the device can often have a different
level of focus compared with the image on the eyepiece.
In order to be able to bring both images into focus, the focus can be adjusted by
those adapters.
8.3 Dark field units
There is the following way to carry out dark field applications.
1. A special dark field condenser can be used in place of the standard condenser.
This as a paraboloid construction and also meets the requirements of
professional application fields, in contrast to a dark field attachment.