Kern OBN 135 handleiding
Handleiding
Je bekijkt pagina 22 van 47
22 OBN-13-BA-e-2511
8.11 Adjusting the Koehler Illumination
To make sure that perfect image results are achieved during microscopic observation,
it is important that the direction of light of the microscope is optimised. If, as with the
devices in the KERN OBN-13 series, the lighting can be set in accordance with
Koehler, the result is homogenous illumination of the slide and avoidance of disruptive
stray light.
The necessary control elements for this are
• Height-adjustable and centre-adjustable condenser with aperture diaphragm
• Field diaghragm
When adjusting the Koehler lighting for the first time, you must first select the lowest
possible objective magnification, so that you can carry out the following steps.
1. Use the condenser focus wheel to position the condenser
directly below the specimen stage. Switch on the lighting
and use the coarse and fine adjustment knob to bring the
slide with the cover glass positioned facing upwards into
focus.
2. Close the field diaphragm completely using its adjusting
ring. When you look in the microscope a blurred image
appears in the aperture. If the microscopic image is
completely dark, the image for the field diaphragm is
outside the field of view and must be brought into the field
of view using the centring screws on the condenser.
3. Adjust the height of the condenser until the image
of the field diaphragm appears sharp in the field of
view. With some microscopes, there is a danger of
raising the condenser too high and causing a
collision with the specimen slide. A little caution is
therefore required here.
Bekijk gratis de handleiding van Kern OBN 135, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Kern |
| Model | OBN 135 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 6939 MB |
