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The equality 2RH4/ρ1 = 2RH5 was used to determine (a) θmin to θmax, (b) Hmin to Hmax, (c) D1 and D2_out, and (d) OPDmax in related to the radius of the Mirror 1 (R1). Yellow-shaded areas in (a) to (d) represent the desired value ranges. (e) Astigmatism for general scan angles (1° to 10°, with a step of 1°) without considering the physical constraints. (f) Astigmatism minimization using DMAA method (when αi = 1) for the constraint-determined scan angle range of θmin to θmax.
