Ch. 4. Tutorial: AC Mode in Air, Std. Scanner Sec. 4.3. Engaging the Surface
(a) Offset. (b) The focus offset is centered and the optical im-
age is confocal with the focused laser spot.
Figure 4.3.: By turning the focus offset knob, it is possible to focus on optical image on the sample while
the laser stays focused on the cantilever.
2.
Observe tune result:
• A graph will pop up with the tune result.
• The resonance curve should peak
around 300kHz.
• The relevant results are automatically
stored. After inspecting that the
amplitude and phase curves look
“clean”, you can close the graph.
HINT Cleaner tunes can be obtained by
blowing the cantilever holder with clean
compressed air prior to loading cantilever to
get rid of any left over silicon/glass debris.
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