Bresser 9203000 Mode D'emploi page 6

All Parts
1. Eyepiece
2. Focus knob
3. Objective turret
4. Stage
5. Mirror
6a. LED lamp (Electronic light source)
6b. Light on/off switch
7. Battery compartment
8. Rubber base
9. Microscope arm
10. Microscope
11. Prepared slide
12. Cover plates and adhesive labels
13. Blank Slides
14. Empty bottles
15. Magnifying glass
16. LR41 batteries
Your Microscope
What is a Microscope?
The microscope is made of two lens
systems: the eyepiece and the objective. We're
presenting these systems as one lens each, so
that it's easier to understand. In reality, how-
ever, the eyepiece (1) and the objective in the
turret (3) are made up of multiple lenses.
The lower lens (objective) magnifies the
prepared specimen (e.g. 11), which leads
to a magnified image of the specimen. The
6
picture, which you can't see, is magnified once
more by the second lens (eyepiece, 1). Then,
you can see the "microscope picture."
Assembly and Location
Before you start, choose an ideal location
for using your microscope. On the one hand,
it's important there is enough light (normal
observation). On the other
important that you can quickly make the
room dark when you want to (projector
observation). Furthermore, I recommend that
you place the microscope on a stable surface,
since you won't be able to get any satisfactory
results on a shaky surface.
Normal Observation
For normal observation, place the microscope
in a bright location (near a window or desk
lamp, for example). Remove the microscope
from the package and tilt the microscope
arm (9) so that it's in a comfortable viewing
position for you.
The focus knob (2) is turned to the upper stop
and the objective turret (3) is set to the lowest
magnification.
Now, take a look through the eyepiece
and adjust the mirror (5) so that you get a
uniformly bright circle of light. Or, you can use
the lamp. You'll find further tips about the lamp
in the next chapter. Now, place a prepared
slide (e.g. 11) under the clips on the stage (4),
directly under the objective. When you take
a look through the eyepiece, you can see the
magnified specimen. At this point, it might
still be a slightly fuzzy picture. The sharpness
is adjusted by slowly turning the focus knob
(2). You can now select a higher magnification
by turning the objective turret and selecting a
different objective.
hand, it's
In doing so, note that the sharpness of
the picture must be adjusted again for the
higher magnification. Also, the higher the
magnification, the more light you will need for
good illumination of the picture.
TIP: Avoid positioning the mirror so that it is
exposed to direct sunlight, since it can cause
a glare, which won't allow you to get a clear
picture.
Electric Illumination
To use the LED lamp (6a), you need two LR41
batteries (1.5 V), which are installed in the Mir-
ror/led lamp of the microscope (7). Remove the
Mirror/LED lamp from the arc holder. Loosen
the screw on the side with a small Phillips
screwdriver and insert the batteries according
to the displayed +/- information. Reattach the
mirror cover and tighten the screw. Replace the
Mirror/LED lamp in the holder.
You can turn on the light with the light on/off