Bresser Junior Biotar 300x-1200x Mode D'emploi page 12

All Parts
1 Eyepiece
2 Focus knob
3 Objective turret
4 Stage
5 Mirror
6 Electronic light source
7 Base with battery compartment
8 Rubber base
9 Microscope arm
10 Microscope "Biotar"
11 Prepared Slides
12 Cover Plates
13 Blank Slides
14 Petri dish
15 Micro projector
16 Replacement bulb
17 3x magnifying glass
18 Settling cylinder
19 Reservoir
20 Shrimp farming accessories
21 Microscope instruments
22 Micro-slicer
23 Hatchery
12
Your Transmitted-light 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, however, 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 im-
age of the specimen. The 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 hand, it's 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 pack-
aging and tilt the microscope arm (9) so that it's in
a comfortable viewing position for you.
C
D
The focus knob (2) is turned to the upper stop and
the objective turret (3) is set to the lowest mag-
nification.
Now, take a look through
the eyepiece and adjust
the mirror (5) so that you
get a uniformly bright
F
circle of light. Or, you
can use the lamp. You'll
find further tips about
the lamp in the next
chapter.