-8-
polarizer and the analyzer if not so.
5.6 Choose the complementary slip as per the sample, then insert into the
slip.
5.7 Put into the Bertrand Lens Slip in the condition of polarizing;
5.8 Adjust the center of the stage.
5.9 Adjustment for round stage rotating center
The rotating axis of the round stage should be in the same line with the
axis of optical system. When rotating the stage, the sample’s center would
coincide with view field’s cross division line intersection point, and image
should move around cross division line intersection point in circular
motion, image should always in the view field. If not, accurate data can’t
be got, and the operation can’t be done correctly, especially for high
power objective.
Adjusting Details:
5.9.1 After getting clear image, choose one image point (
I
) at the
observational position, then moving mineral sample , making
I
in cross
division line’s point, and it is the center of field (mark:
O
1
).
5.9.2 Stage must rotate at least one circle, if actual rotating center (mark:
O
) isn’t coincided with field center
O
1 ,
image point
I
will do circular
motion around stage rotating center
O
.
5.9.3 The angle from rotating stage to initial position is 180°, point
I
will
move from
O
1
to the full distance position , the symmetric point to point O.
Adjusting the stage focusing screw, point
I
will move to point
O
, then
move mineral sample gently, make point I coincided with field center
O
1 .
5.9.4 Rotating stage one circle again, if image point
I
isn’t off point
O
1
,
it
means point
O
has coincided with point
O
1
,
then the center adjustment is
finished. If not, please repeat step2 , 3, 4.
