Olympus BHS-653P Manual de instrucciones - Página 15
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E.
Centering the Stage
1) Place a specimen on the stage, and insert two centering wrenches
into the stage center-
ing screws (Fig. 13). Looking through the eyepiece and objective IOX, fix your eyes on
some particular point, for instance, at the point A or the center of the cross hairs.
2) As you rotate the stage, the particular point in the specimen image moves f rom the point A
in a circular path ( A
+
B
+
C
+
D
+
A or A
+
D
+
C
+
B
+
A ) around the center of the
circular path E. (Diag. a)
3) When the stage is turned by 180° from the
point A, the particular point coincides with
the point C.
4) Coincide the particular point to the point E
by means of the two centering wrenches
(Fig. 13). (Diag. b)
5) Next, move the particular point from the
point E to the center A of the cross hairs
(Diag.
c).
Ir Repeat this procedure until the stage centra-
tion is complete. After completing the cen-
tration, remove the wrenches.
Fig. 13
Diag. a
Diag. b
Diag. c
F.
Centerins the Obiectives
This objective centration is necessary to all
the PO objectives except P010X. After
completing the stage centration, insert two
centering wrenches
a
into the objective
centering screws provided at each centerable
objective aperture in the nosepiece. (Fig.
14) The other procedure is just the same as
with stage centration.
G.
Use of Iris Diaphragms
Fig. 14
When the top lens of the polarizing condenser is swung out for orthoscopic observation, the
aperture iris diaphragm serves as a field iris diaphragm and the field iris diaphragm as an aper-
ture iris diaphragm.
For conoscopic observation, generally the aperture iris diaphragm is fully opened and the
field iris diaphragm can be effectively used for reduction of glares and conoscopicobserva-
tion of very small objects.