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Table 1

Charge 2 VC: main parameters for the combination of apodizers and Lyot stops that give the highest system throughputs for the five aperture diameters COA and the three spider thicknesses tS.

C O A t S C O LS T A T LS T LP T max IWA Contrast
10 0 32 90 83 66 62 0.9 5 × 10-8
15 0 38 85 80 56 52 0.9 4 × 10-8
20 0 50 87 70 49 42 0.8 5 × 10-9
25 0 52 80 69 42 34 0.9 6 × 10-8
30 0 58 79 64 36 27 0.9 8 × 10-8
10 0.5 28 83 84 57 52 0.9 3 × 10-8
15 0.5 40 84 77 52 46 0.9 1 × 10-8
20 0.5 48 83 71 46 39 0.9 2 × 10-8
25 0.5 58 84 62 39 29 0.8 5 × 10-9
30 0.5 58 77 64 34 24 0.9 7 × 10-9
10 1 28 63 84 38 29 1.1 3 × 10-8
15 1 40 64 77 35 26 1.1 5 × 10-8
20 1 48 65 71 32 23 1.2 6 × 10-8
25 1 58 67 62 28 18 1.5 7 × 10-8
30 1 58 67 64 29 18 1.4 2 × 10-8

Notes. COLS refers to the central obscuration of the Lyot stop. These three parameters are given in percent: of pupil diameter. The transmission of the apodizer and the Lyot stop are noted TA and TLS (in % of incoming light). The maximum fraction of the incoming planet light transmitted by the Lyot plane is noted TLP, and is given in % of incoming light as well. The last three columns display the effective maximum throughput Tmax (measured in the image plane), the IWA (in units of λ/D), and the mean contrast at one IWA from the star.

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