5 OPERATION
5-34
EM210F-1
5.3.7 Image
Focusing
Image focusing at low magnifications is easy when the image wobbler is used. Focusing
at high magnifications however, is not easy with the image wobbler. Image focusing with
Fresnel fringe is recommended at high magnifications. At very high magnifications,
micro particles on the specimen are used for image focusing.
Fig. 5.34
5.3.7a
Using Image Wobbler
1.
Select “Maintenance” on the “TEN Controller” main menu to display the
“Alignment Panel for Maintenance” screen.
2.
Set the microscope to the MAG mode.
3.
Depress IMAGE WOBBLER X or Y (R1-
②
) or depress “Wobbler-Image X or
Y” on “Alignment Panel for Maintenance” screen.
A doubled-image appears on the screen..
?
If an objective aperture and/or the slit is/are in the beam path, the field of view
will be obstructed. To avoid the obstruction, use the larger aperture or remove
both the aperture and slit from the beam path.
4.
Manipulate OBJ FOCUS (R1
⑦
) so as to make the doubled-image a single
stationary image.
5.
Turn off the IMAGE WOBBLER X or Y (R1-
②
) or depress “Wobbler-Image X
or Y” on “Alignment Panel for Maintenance” screen to turn off “Wob-
bler-Image X or Y”.
