Multi-DM™ User Manual Section 9 - DMShapes Software Overview
BMC Document Number: DOC-0009 Rev. 5.2 Page 35
9.1.3 The DMShapes Actuator Map Display
The Actuator Map Display area contains a graphical representation of the DM actuators.
The actuator array is shown with each actuator numbered.
Surrounding mirror segments without actuators are not shown.
Note that the display does not reference the orientation in the DM housing.
For that orientation see Section 9.2, Multi-DM Mechanical Drawing.
A grid delineating the actuators can be toggled on and off using the menu
command Options > Show Grid.
The displacement value currently being sent to each actuator is displayed using
the color spectrum that is shown in the Piston Color Bar.
• Blue represents a zero displacement (un-powered) command being sent.
• Red represents a maximum displacement (full stroke) command being sent.
The Actuator Map does not display the actual deflection of the DM actuators,
but rather the deflection commands being sent to each individual actuator
by the Multi Driver.
• For continuous DMs, the actual displacement is determined by the magnitude
of the command sent to the actuator with an offset caused by inter-actuator
coupling. For a detailed explanation of this effect see Section 10.10, Deflection
and Inter-Actuator Coupling.
• For segmented DMs, the actual displacement is determined only by
the magnitude of the command sent to the actuator.
The actual state of the mirror must be monitored through direct observation.
Within the map, each actuator can be individually controlled. Click on an actuator
to display a spin box that allows you to set the actuator value by clicking the up or down
arrows or by direct keyboard entry. The value is immediately applied to that actuator
on the DM.
The actuator value must be a 2-place decimal between 0 and 1 inclusive.
To set values with greater precision, up to a 14-bit value, use a Command Map
or MathWorks MATLAB, National Instruments LabVIEW, Python, C or C++ program
control.
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