4 PREPARATION FOR OBSERVATION
•
Shift the laser beam spot so that it illuminates the tip of the cantilever, as shown
below.
b.
Adjustment procedure 2
•
At this stage of adjustment, observe the laser beam spot on the specimen surface.
Specimen
Laser beam
•
Carry out fine adjustment of the laser beam spot position so that the laser beam
spot on the specimen becomes as dark as possible.
The range of the laser beam position adjustment is wide enough to handle almost
all cantilevers. If the laser beam position fails to shift even though the laser beam
illumination adjustment knobs are turned, the laser beam position may have
shifted out of the beam position adjustment range. In such a case, check the fol-
lowing points.
Is the cantilever holder inserted properly (does it touch the innermost wall) ?
•
Especially in the case of the cantilever holder, its insertion becomes difficult due
to the electrode on the holder when the holder gets near the innermost wall. Be
sure that the holder touches the innermost wall.
4-12
TMPM5200-2
