Idiomas disponibles
Idiomas disponibles
From there, the light is refl ected back and
passes through the objective and eyepiece
(where it gets magnifi ed) into the eye. This is
refl ected light microscopy.
For transparent objections (e.g. protozoa), on
the other hand, the light shines from below,
through the opening in the microscope stage
and then through the object.
The light travels further through the objective
and eyepiece, where it is also magnifi ed, and
fi nally goes into the eye. This is transmitted-
light microscopy.
Many microorganisms in water, many plan
components and the smallest animal parts
are already transparent in nature. Others have
to be prepared. We may make them transpar-
ent through a treatment or penetration with
the right materials (media), or by taking the
thinnest slices from them (using our hand or
a specimen slicer), and then examine them.
You can read more about this in the following
sections.
How do I make thin specimen slices?
Only do this with the supervision of your par-
ents or another adult.
As I already pointed out, the thinnest slices
possible are taken from an object. In order to
get the best results, we need some wax or
paraffi n. It is best if you get a candle. Place
14
the wax in a pot and heat it carefully over a
low burner. Now, dip the object in the liquid
wax a few times. Then, let the wax get hard.
Using the specimen slicer (Fig. 6, 23) or a
knife/scalpel, cut the smallest slices from the
object that is covered with wax. These slices
are to be laid on a slide and covered with a
cover slip.
How do I make my own specimens?
Fig. 7
2^
Take the object that you want to observe and
place it on a glass slide (Fig. 6, 20). Then,
add a few drops of distilled water on the ob-
ject (Fig. 7) using a pipette (Fig. 7, 26). Now,
place a cover slip vertically at the edge of the
drop of water, so that the water runs along the
edge of the cover slip. Then, slowly lower the
cover slip over the water drops (Fig. 8).
Note:
The included glue "gum media" (Fig. 5, 21b)
is used to make permanent prepared speci-
mens. Use this in place of the distilled water.
If you want to keep the object in place on the
slide permanently, use the gum media.
Smartphone holder
Attach the smartphone holder (22) to the
eyepiece. The suction cups must be clean
and free from dust and dirt. A slight moiste-
ning is helpful.
Now press your smartphone on the retai-
ning plate and make sure that it is properly
secured.
As a backup, you should secure it with the
enclosed rubber strap.
Fig. 8
Smartphones with a rough surface will not
hold as good as smartphones with a smooth
surface.
Now start the Camera app. The camera
needs to rest just above the eyepiece.
Center the smartphone exactly over the
eyepiece, so the image can be seen precise-
ly centered on your screen. In some cases
you need to adjust with the zoom function to
display the image fullscreen. A light shading
at the edges is possible.
Take the smartphone carefully off the holder
after use.
NOTE:
Make sure that the smartphone can not slip
out of the holder. Bresser GmbH assumes
no liability for any damages caused by a
dropped smartphone.
