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2.3 Graphical User Interface (GUI)
2 - 28
2.3.6.4 Auto Control
Fig. 2.3-10 Auto Control
(1) ABCC
Starts auto brightness/contrast control (ABCC). If the results of ABCC are not adequate,
you can change the reference brightness and contrast in the Image tab of the Setup dialog
window. ABCC is applicable to SE and BSE signal.
(2) AFC
Starts Auto Focus Control.
When magnification is lower than 5,000×, coarse focus (search using a wide focus range) is
carried out. Fine focus (search using a narrow focus range) is carried out at magnifications
higher than 5,000×.
Fine focus works correctly under conditions where the image is not clear but visible.
The result of Auto Focus depends on the surface structure of the specimen.
When there is little or no surface detail on the specimen, or when the specimen is charged,
Auto Focus will not operate properly.
(3) ASFC (Auto Stigma & Focus Control)
Automatically corrects the stigma and focus.
(4) Align
Opens Alignment dialog window and starts Aperture alignment.
Fig. 2.3-11 Alignment Window
See <3.4.2 Axial Alignment>.