South Pole Telescope Design
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South Pole Telescope Design
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SPST183 uses a cold silicon lens as the final element. Figure 1 - side view, all fields Figure 2 - detail of Fig. 1. Figure 3 - same as Fig. 2, but only central field Figure 4 - Spot diagram. Figure 5 - focal plane spot diagram Figure 6 - distortion at focal plane Figure 7 RMS wavefront error vs. field Figure 8 - Polarization vs. pupil Figure 9 - Point-spread function, off-axis field Figure 10 - illumination of primary, central field Figure 11 - illumination of primary, field 8 Figure 12 - illumination of primary, field 10. Figure 13 - drawing of silicon lens. Something to worry about: it's much thicker in middle than edges, leading to "reverse apodization" of beam.
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