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| Position # | Description | JCI Name | Stepper Counts * |
| 1 | Field Mask 1 (23.156 x 17.368)
10% oversized |
Field1 | 71 |
| 2 | Field Mask 2 (25.262 x 18.946)
20% oversized |
Field2 | 214 |
| 3 | Polarimetric mask 1 | Polm1 | 350 |
| 4 | Polarimetric mask 2 | Polm2 | 495 |
| 5 | Coronographic spot beta* (tilted) |
Coron1 | 638 |
| 6 | Coronographic spot alpha* (tilted) |
Coron2 | 780 |
| 7 | Alignment spots | Spot | 920 |
| 8 | Alignment grid | Grid | 1066 |
| 9 | Slit dekker | Dekker | 1206 |
| 10 | Blank |
Blank | 1360 |
(a) The pinholes
are 400, 100 and 400um diameter for the alignment spots
(b) All pinholes are
100um diameter for the alignment grid
* Two similar coronographic masks are installed, both with a
central obscuring spot of 1.4mm diameter (1.66 arcsec), differing only
in their spot deposition process. Commissioning will investigate
the best spot.
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Chris Packham; Feb 13th, 2007
