OPERATION
Carl Zeiss
Illumination and Contrast Techniques in Transmitted Light
Axio Vert.A1
86
431030-7044-001
05/2012
4.11.7
Transmitted Light Polarization
Contrast
The technique of viewing transparent objects
between crossed polarization filters is employed in
geology and mineralogy, in particular. Increasingly,
it is also used for plastic, glass, technical films, etc.
With this technique, optical anisotropies (e.g.,
tensions) are rendered visible, which would
otherwise go undetected with reflected or
transmitted light methods.
Setting the Polarization on the Axio Vert.A1
MAT, Using Polarizer DL and Analyzer Slider A
12x35 mm, Rotatable 90 Degrees
•
Set up the microscope for bright field in
transmitted light.
•
Slide polarizer DL (Fig. 4-12/
1
) on the condenser
2
) in the light path.
•
Insert the analyzer slider (Fig. 4-13/
2
) (a P&C
analyzer module in the reflector turret may be
used as an alternative) into the slot (Fig. 4-13/
1
)
under the nosepiece. The analyzer can be
rotated 90 degrees.
•
Use the analyzer turning lever (Fig. 4-13/
4
) to
cross the vibration direction of the analyzer and
polarizer (dark position).
•
The analyzer slider may be inserted both from
the left-hand and right-hand sides.
For the purpose of color-contrasting
anisotropic materials, compensator
Lambda or compensator Lambda Pol
sub. ±10° (Fig. 4-16/
3
) may be used.
To do so, place the compensator on
the analyzer.
The typical approach would be first
to bring in crossed position the
polarizer and analyzer, without the
specimen being in the light path,
and to put on the specimen only
when the field of view has reached
maximum darkness.
Polarizer DL may only be used together with condenser 0.4 with modulator disk 424228-
9010-000.
Fig. 4-12 Setting Bright Field
Fig. 4-13
Setting the Polarization
Summary of Contents for Axio Vert.A1
Page 1: ...Operating Manual Axio Vert A1 Inverted Microscope ...
Page 106: ......
