Chapter 3 Operation Details
44
3.13.2 Adjusting the polarizer direction
Each time you turn the polarizer rotation ring, the
direction of the polarizer is changed. You can turn the
polarizer 360 degrees.
When the “+” mark on the polarizer rotation ring is
aligned with the “T” mark, the crossed Nicol’s
position is made. When the “=” mark on the rotation
ring is aligned with the “T” mark, the open Nicol’s
position is made.
■ Checking the crossed Nicol’s position
Place the unit in the optical path. And then, place a
sample with a flat and plain surface onto the stage.
Set up the microscope for the simplified polarization
microscopy under the episcopic illumination.
Remove one eyepiece from the eyepiece tube and
look inside the open sleeve. You can see the
objective pupil as a bright circle.
Turn the polarizer rotation ring in either direction until
a dark cross appears in the view-field as shown in the
figure. This is the crossed Nicol’s position.
Figure 3.13-3 Adjusting the polarizer direction
Dark cross
Crossed Nicol’s
position (1)
Polarizer direction
(1)
(2)
(1)
Open Nicol’s
position (2)
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