Table 1
Main parameters of the five different apodizers optimized for a 4QPM coronagraph.
| Mask # | T LS | T A | T max | IWA | R bin |
|
|
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| 1 | 83% | 16% | 5% | 1.37 λ/D | 6% |
| 2 | 79% | 42% | 23% | 1.10 λ/D | 7% |
| 3 | 74% | 66% | 44% | 1.06 λ/D | 7% |
| 4 | 69% | 88% | 64% | 1.01 λ/D | 6% |
| 5 | 59% | 92% | 56% | 0.99 λ/D | 5% |
Notes.Each mask corresponds to a specific Lyot stop, with a transmission TLS. TA is the transmission of the apodizer. This results in the system’s total throughput T. The IWA of the coronagraph is given in units of λ/D. Finally, Rbin is the ratio between the non-binary surface of the mask and the total surface of the mask. The non-binary elements are defined as having a transmission higher than 1% and lower than 99%.
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