Bresser DigiMicro DM700 LCD Mode D'emploi page 22

deleting devices that are no longer in use
helps here. To do so right click WORKPLACE
(COMPUTER in Vista) and open the PROP-
ERTIES menu. Then click the ADVANCED
(ADVANCED SYSTEM SETTINGS in Vista)
and then ENVIRONMENT
Choose the NEW option in ENVIRONMENT
VARIABLES. Enter the following under VARI-
ABLE NAME.
devmgr_show_nonpresent_devices
Under VARIABLE VALUE enter „1". Confi rm
your input with OK and then reboot the com-
puter. Change to the device manager. In the
VIEW menu activate the SHOW DEVICES
OPTION. The ghost devices previously not
shown will now be displayed in light grey.
Check the various categories including USB,
memory size, etc. Only delete entries for de-
1
vices you no longer use.
1
Source: Microsoft Knowledge Base
http://support.microsoft.com/kb/315539/de
3. Using the Microscope
3.1 Basic Prerequisites
Before you observe objects or specimens,
you must turn on the LCD monitor and the il-
luminator. You also have to know how to op-
erate the mechanical stage. Then you will be
ready to start observing.
22
3.2 LCD Module
This digital microscope is different than a
conventional microscope. The LCD monitor
replaces the eyepieces that are used on typi-
cal microscopes for observing. As a result, it
VARIABLES. is possible to share your observations with
others by using the monitor. Before you start
observing, you must turn on the LCD moni-
tor by pressing the on/off switch (see Fig. 3).
Press and hold the button until the LCD moni-
tor activates. This is the sign that the LCD is
activated. Basically, this is all you have to do
to get the LCD monitor ready for observing.
The different keys of the LCD module are
used mainly for taking pictures (photographs
and videos) and they will be explained later in
these instructions.
3.3 Illumination
With this device, a transmitted-light and re-
fl ected-light microscope, you are able to ob-
serve transparent as well as non-transparent
objects. The image information of the given
object is „transported" by the light. The cor-
rect lighting determines whether or not you
can see the object!
The Digital Microscope offers you three illumi-
nation options in total – their use depends on
the object you would like to observe.
a) surface illumination (light from above),
b) substage illumination (light from below) or
c) surface and substage illumination (light from
above and below at the same time).
If you press the On/Off button (11) once, the
surface illumination (8) will be turned on. If you
press the button a second time, the illumina-
tion switches to substage (9). If you then press
the button a third time, both surface and sub-
stage illumination are engaged. Another press
of the button turns the lighting completely off
again.
Choosing the right lighting depends on what
you would like to look at.
If you observe non-transparent (opaque ob-
jects (e.g. small animals, parts of plants,
stones, coins, etc.) with this microscope, the
light falls onto the object from above (refl ect-
ed-light microscopy). The light then bounces
back and enters the objective, which magni-
fi es the image. The light then passes into the
electronic eyepiece, which magnifi es the im-
age further.
For transparent objects (e.g. protozoa), on the
other hand, the light shines from below through
the opening in the stage and then through the
object (transmitted-light microscopy). The light
again passes through the objective and into
the electronic eyepiece.
Using both lights at the same time only makes
sense for semi-transparent objects. This op-
erating mode is not recommended for trans-