THORLABS DMH40-F01, Operation Manual

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© 2021 Thorlabs
4 Operation
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Restore resets all Zernike sliders to the home position and the voltage of all mirror segments
and arms to 150 V.
Relax is a function that removes mechanical tensions in the mirror. For details, please see sec-
tion Relaxing the Mirror . Click the Relax button to relax the entire mirror.
Hysteresis Compensation
The last topic in the Mirror control menu
serves to enable/disable the hysteresis com-
pensation for the mirror segments. Since,
in contrast to DMP40, the DMH40 does not have arms to tilt the mirror, this option is grayed
out.
By default, the hysteresis compensation is enabled. However, if it is desirable to analyze hys-
teresis effects on the mirror shape, the hysteresis compensation can be disabled by uncheck-
ing the appropriate box.
The CONTROL LOOP Settings Menu
This menu is only enabled when a wavefront sensor is used to facilitate a
control loop. This is a short menu to enable / disable the Zernike coeffi-
cients used for closed loop control. A red colored menu topic indicates that
no Zernikes are selected.
Select the desired Zernike coefficients that you want to maintain ZERO
during closed loop control.
In the Control Panel, tab Control Loop Settings , this selection can be
made as well.
The HELP Menu
The keyboard button F1 brings up the online help at the first
chapter. The search function allows to find the chapter of in-
terest.
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