Kern OBN 135 handleiding
Handleiding
Je bekijkt pagina 31 van 47
31 OBN-13-BA-e-2511
With the surface marked “TOP” facing up, the PH slider is pushed upwards into the
insertion point on the PH condenser until it clicks into the first position. At this first
position, the phase ring of the PH slider is in the beam path. If the aperture setting
on the PH condenser is set to “PH”, then the phase-contrast application can begin.
In order to return to the bright field application, you must push the PH slider further
to the second click position. At this point there is no PH ring as in position 1; the
beam can pass without being affected by the PH slider.
The PH objective has a PH ring in its lens system, just like the PH slider. Due to
their size on one hand and their positioning on the other, these two rings must be
aligned to one another in the beam path. The position of the ring in the objective
cannot be altered, that of the ring in the slider however can be. Although it has been
pre-centred, it may still be necessary that after a certain period of use it will need
to be re-centred using the three Allen bolts on the side of the slider and the centring
telescope. For further information on adjusting the PH rings, please see page 31.
Depending on the preferences of the user, using a green filter can produce a more
effective and pleasant image. To achieve this, the green filter must be screwed onto
the underside of the PH condenser..
2. Comprehensive phase contrast unit
This consists of a PH universal rotary condenser, four PH objectives (10x, 20x, 40x
and 100x), a centring telescope, two centring turnscrews and a green filter. To use
this, you need to replace the standard condenser of the microscope with the PH
universal rotary condenser. The required objectives are also screwed into the
nosepiece and one of these is positioned in the beam path. The two centring
turnscrews can be fitted to the relevant points on the sides of the condenser using
the screw connection on their spring retainer.
The condenser has a hub with six positioning options. Four of these are fitted with
a phase ring, which matches only one specific objective magnification. When doing
this you must note the marking on the rotary knob at the relevant position. The other
two positions are intended for bright field applications.
A PH objective has a PH ring in its lens system, just like the individual positions of
the PH universal rotary condenser. Due to their size on one hand and their
positioning on the other, the two related rings must be aligned to one another in the
beam path. The position of the ring in the objectives cannot be altered, that of the
rings in the condenser disc however can be.
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 |
