Veeco Dimension 3100, Manual

Page: 129 / 376

Head, Probe, & Sample Preparation
Basic AFM Operation
Rev. D Dimension 3100 Manual 109
Figure 7.2g Photodetector Adjustment Knobs
Note: You may now restore the illuminator lamp to increased intensity for improved
video image quality.
Silicon Nitride Tips (Contact Mode AFM)
In order to place the laser reflection at the end of the cantilever, you must shine a laser beam on
either the granite base or a piece of paper.
1. You can view the laser spot several different ways:
a. If a cantilever is being replaced, first select Stage > Load New Sample to reflect the
laser off the of the granite base while it is locked in the Z-stage dovetail (as discussed in
Section 7.1.2 ).
b. If the cantilever has already been removed, you may need to raise the Z-stage by
selecting Stage > Focus Surface or Motor > Withdraw .
c. You can see the laser spot by removing the SPM head from the dovetail (without
unplugging the cable between the SPM head and the Dimension base) and holding the
SPM head over the granite or piece of paper.
2. Verify the laser beam is visible on the surface below. If it is not, turn the rear-right laser
control knob counter-clockwise until the laser spot appears on the surface below.
CAUTION: Use extreme caution when removing the SPM head. Hold the head
firmly and do not stress the wire between the SPM head and the
Dimension base. Dropping the head will likely result in damage
and Veeco factory repair.
(Vertical)
AFM / TM Detector
Mirror Adjustment
(Horizontal)
LFM Detector
Mirror Adjustment