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NICI Focal Plane Masks |
The NICI Focal Plane Mask wheel lies outside the dewar, ahead of the
pupil masks and the beam splitter. These masks provide the
central obscuration for coronagraphic imaging. The masks expected
to be available in the initial instrument configuration are listed
below. Because the mask wheel is external to the dewar, it is
relatively straight-forward to add or change masks and additional
positions are available for user-defined masks.
| NICI Focal Plane Masks | |||
| Position | Mask Name | Description | Gemini ID |
| 1 | Open | -- | |
| 2 | Pinhole Grid | G... | |
| 3 | 0.22 arcsec radius | G... | |
| 4 | 0.32 arcsec radius | G... | |
| 5 | 0.46 arcsec radius | G... | |
| 6 | 0.65 arcsec radius | G... | |
| 7 | 0.90 arcsec radius | G... | |
| 8 | User-defined | G... | |
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Created July 15, 2005, B. Rodgers and T. Hayward