1. ZTFC field flattener architectures R. Dekany 20 July 2012

2. Some terminology Chorded – Applies to ZTF CCDs – Independent tip/tilt and piston per chord – 4-chord and 12-chord options Segmented – Applied to field flatteners – Options with and without global field flattening window RMS spot radius – Unaltered Zemax reported spot radius in microns Notes – Fixed Schmidt correction position – All glass in this report is fused silica (F_SILICA)

4. 4-segment flattener no window no filter

6. Mosaic center

7. 4-segment flattener t = 10 mm flat window aspect = 14.4 no filter

10. 4-segment flattener t = 10 mm convex-plano window R = 6671 mm, aspect = 14.4 no filter

14. 4-segment flattener t = 10 mm convex-plano window R = 6671 mm, aspect = 14.4 flat filter aspect = 14.4

17. 4-segment flattener t = 10 mm convex-plano window R = 6671 mm, aspect = 14.4 flat filter aspect = 20

21. 12-segment flattener t = 5 mm convex-plano window R = 6671 mm, aspect = 14.4 flat filter aspect = 20

23. (Overlay on same scale)