South Pole Telescope Design
8 December 2003

South Pole Telescope Design

SPST320

This design is similar to SPST313.  The secondary is shaped.  It is shown here in two versions---one with, and one without, a chopper at the image of the primary.

Figure 1 - full side view, with chopper, all fields

Figure 2 - Same as figure 1, except chopper and flat quatenary have been removed.

Figure 3 -  Design is well-corrected for 2mm observations.  I have not yet fully optimized this design, so it may get better.

Figure 4 - Spot diagram with 2 mm Airy disk

Figure 5 -  secondary is fairly small compared to other designs.