THORLABS DMH40-F01, Руководство по эксплуатации

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2 Operating Principle
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Relaxing the Creep
The Thorlabs Deformable Mirror software offers a Relax function. By pressing the appropri-
ate button, the control voltages of all segments are increased and decreased sequentially, start-
ing at the full range (0 to 300 V) with subsequent decreasing amplitude, reaching at the end the
mean voltage of 150 V. This way the time required to come to a stable and nearly flat mirror
shape is shortened drastically.
Drift effects occur whenever the mirror’s control voltage is changed. For instance, a step from
150V to 300V on all segments causes a step from zero to about 11.3 µm spherical amplitude.
Drift after 150 V -> 300 V Step (Short Term)
Although this 11.3 µm deflection seems to be stable after a few minutes, there is a long-term
drift towards 13.2 µm after 10 hours:
Drift after 150 V -> 300 V Step (Long Term)
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