3B Scientific Demonstration Polarimeter - Manual

4
Operating instructions
The U14390 polarization device is designed for use on
a daylight projector as part of qualitative and quanti-
tative experiments conducted before large audiences
at schools and universities, for example in order to
demonstrate optical activity as well as determinations
of specific angles of rotation, or concentrations if these
angles are already known.
1. Safety notes
• Do not clean the polarization demonstration de-
vice with aggressive agents.
• Do not fill the cuvette with liquids which attack
plexiglass.
• Ensure that the filters do not get scratched.
2. Description, technical data
A yellow filter and a polarizer are set in the middle of a
black, plastic base plate. A cuvette marked at 50 mm
and 100 mm and containing a solution of the substance
to be examined is inserted into the inner holder and
subsequently covered by an analyzer mounted on an
outer holder equipped with a rotary knob and a pointer.
Turning the analyzer allows the angle of rotation to be
read on a transparent scale ranging from + 40° to
–40° and having divisions of 1°.
Dimensions:
370 mm x 330 mm x 190 mm
Illustration 1:
1 Yellow filter 5 Holder with rotary knob
2 Polarizer and pointer
3 Holder for the cuvette 6 100-mm mark
4 50-mm mark 7 Cuvette
2. Operating principle
Light (visible electromagnetic radiation) emitted by the
daylight projector is made to pass through a yellow fil-
ter, as yellow light by definition increases the measure-
ment accuracy.
This light oscillates in a number of planes:
3B SCIENTIFIC® PHYSICS
U14390 Polarization Demonstration Device
3/03 ALF
1
4
3
2
5
1 Base plate
2 Angular scale
3 Plug
4 Rotary grip with a pointer
5 Analyzer
x
z
y
Illustration 1
®
7
6
5
4
3
2
1
x
z
y
Licht Light