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ScanImage 3.5 adds some simple tools related to the tasks of scan and beam alignment. All relevant controls are on the Main Controls window:
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 These controls relate to the scanOffsetX/Y Rig Configuration INI-file variables described below.
- SET 0: Pressing this button causes the current X/Y Shift values (displayed at top right of Main Controls) to be added to the current Offset X/Y values. X/Y Shift values are reset to 0. The option is provided to the user to save the new values to the scanOffsetX/Y variables in the INI file loaded at startup, saving the new alignment for the future.
- PARK 0: Pressing this button parks the mirrors, and hence the laser beam(s), at the values specified in scanOffsetX/Y. Additionally, the shutter is opened, and each Pockels Cell (where present) is set to the power level specified in the Power Control window for each 'beam'. The user may then employ mirrors or other means to ensure that each beam is centered with respect to the back focal aperture of the objective lens. When done, the user closes the dialog box as prompted, to close the shutter and return the mirrors (beams) to the parked laser position.
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{center}[!ScanImage Pics^r3_5_MainControls.png|height=200!|ScanImage Pics^r3_5_MainControls.png]{center}
h5. New Controls
(/) These controls relate to the _scanOffsetX/Y_ Rig Configuration INI-file variables described below.
* *SET 0*: Pressing this button causes the current X/Y Shift values (displayed at top right of *Main Controls*) to be added to the current _Offset X/Y_ values. X/Y Shift values are reset to 0. The option is provided to the user to save the new values to the _scanOffsetX/Y_ variables in the INI file loaded at startup, saving the new alignment for the future.
* *PARK 0*: Pressing this button parks the mirrors, and hence the laser beam(s), at the values specified in _scanOffsetX/Y_. Additionally, the shutter is opened, and each Pockels Cell (where present) is set to the power level specified in the *Power Control* window for each 'beam'. The user may then employ mirrors or other means to ensure that each beam is centered with respect to the back focal aperture of the objective lens. When done, the user closes the dialog box as prompted, to close the shutter and return the mirrors (beams) to the parked laser position.
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| title | INI File _Rig Configuration_ Changes |
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- scanOffsetX/Y: (Previously below Rig Configuration section) Specify offset voltages for mirror command signals. These variables are unique among the Rig Configuration variables in that they can be altered during ScanImage operation, using the Set 0 button.
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{center}{link-window:ScanImage Files^r3_5_standardINI_rigConfig.txt|target="_blank"}View _Rig Configuration_ Section of Model INI File{link-window}{center}
h5. Modified Variables
* *scanOffsetX/Y*: (Previously below Rig Configuration section) Specify offset voltages for mirror command signals. These variables are unique among the Rig Configuration variables in that they can be altered during ScanImage operation, using the _Set 0_ button.
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Usage Notes
The scanOffsetX/Y values are considered INI file Rig Configuration variables because an individual rig should only have one correct scan alignment. However, different users could employ separate scanOffsetX/Y values by using distinct INI files, as described in Initialization (INI) File Handling.
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