AO Software Design Book

APPENDIX F Device Characterization Files

TTM

TTM X and Y tilt gains and transformation

This data will tell us what signals need to be sent to the TTM to move the image to a given part of the field (about 2 arcseconds in diameter). The data will be in the form of a transformation matrix.

DM

DM Interferometer-DM actuator mapping table

This table tells where in the phase map each actuator is located. This will be used to set the figure of the DM to a given shape.

Phase map of the DM when the image is sharpened

This is the figure of the DM after performing the image sharpening procedure. This tells us the cumulative wavefront errors that we have in the AO system. We may also want to use this phase map in other calibrations.

WFS

Lenslet group positions

These recorded positions of the WFS lenslet XY translation stage will indicate the proper positions for each lenslet group.

Best-focus positions (of the WFS camera stage) of each lenslet group

The name of this file is of the form...TBD

The file format is as follows... TBD

Wavefront Sensor Mapping table

This file is an ascii file indicating which pixels correspond to which Shack Hartmann spot centroids, and which spots are to be used by the wavefront controller. The file contains x,y location and x,y width in pixels for each active subaperture. Created and maintained by the UISC. For information on how this file is managed, See "Load WFS mapping table" on page 9-31.

The file name is of the form... TBD

The file format is as follows...TBD

FSM positions required to select a given field position

This will be an ascii file with 6 columns of numbers. The first two columns will be the X and Y field position. The next four columns will be the required positions of the WFS field steering mirrors (FSM).

WFS field/focus-dependent offset vector

This is the result of "WFS offset vector as a function of field and focus position" [6.4.3.6]. We will most likely want to edit this file extensively.

T/FS

XYZ motions of the T/FS translation stage needed for each ND filter

Field position to T/FS sensor stage XYZ positions conversion

Visible ADC

Visible ADC dispersion power as a function of delta theta

Visible ADC zero-deviation wavelength

Predicted image wobble of the visible ADC

IR ADC

IR ADC dispersion power as a function of delta theta

IR ADC zero-deviation wavelength

Predicted image wobble of the IR ADC

Acquisition Camera

Transformation from Acquisition camera field to T/FS, WFS, NIRC-II, and the diagnostics camera fields

Scott, I think the Acq. cam mapped to mm of focal plane is our base coordinate system, and each device, T/FS, WFS, NIRC-II would have in it's own device file a mapping of it's device units into mm of focal plane (or acq. pixels.)

What I'm saying is that the T/FS mapping to our standard units should live in the T/FS file, and the WFS mapping into our standard coordinate system should live in the WFS file etc. What do you think?

Diagnostics Camera

Telescope Simulator

White light source infinite-focus position.

The telescope simulator will have a small focus stage for the white light source. This stage will allow the focus to be set precisely, but also allow the source to be moved out of focus for phase diversity and other tests. The position where the source is at the infinite (or best) focus position is what this section refers to.

Telescope simulator tip/tilt mirror on-axis position.

Setting the tip/tilt mirror to this position should put the white light source on axis in the AO system.

Telescope simulator field positioner and telescope simulator focus stage position for a desired field position.

Best-focus, on-axis position of the telescope simulator laser source.

NIRC2

AO Software Design Book - 25 FEB 1997

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