Cypher SPM
User Guide
3. Focus the blue laser spot.
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This is achieved with a 0.050” hex wrench that is inser-
ted into the filter cube hole, as shown to the right.
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Open the door to rotate the wrench.
The blue spot turns off.
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Blindly focus the blue light by rotating the wrench,
and then close the door to see the blue light appear
again.
This step might take several cycles to achieve proper
focus.
4. Reset (x,y) focus position for a filter cube.
Tip:
You should perform this step for every filter cube that you use.
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Enable the focus positioning box by clicking the icon
on the top right of the View Module window, as
shown to the right.
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Right-click on the focused blue laser spot, and select
Reset Blue spotOn Position. The box will move to
register the new blue spot position.
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If the Reset Blue spotOn Position option does not
appear, select Options > Show Reset (red/blue)
SpotOn Menu Item.
16.5 Choosing the correct cantilever
As a general rule, gold-coated cantilevers have the best photothermal response and lead to the
highest amplitudes for the least amount of blue light power. We recommend the use of gold
coated cantilevers to achieve the largest amplitudes with blueDrive.
However, other cantilevers may be used, especially in applications which require small amplitudes.
The best way to determine if a cantilever will work with blueDrive is to simply test it out by acquir-
ing a cantilever tune with blueDrive and noting the maximum attainable amplitude.
16.6 39.4.2 Choosing the correct filter cube
The maximum cantilever oscillation amplitude that is attainable for a particular cantilever scales
with the filter cube gain factor (0.01x, 0.03x, 0.10x, 0.30x, or 1.00x). For example, if a 0.10x filter cube
results in a maximum amplitude of 100 nm on a cantilever, it is expected that a 0.30x filter cube will
result in a maximum amplitude of 300 nm.
16 blueDrive photothermal excitation
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