Theoretical performance of solar coronagraphs using sharp-edged or apodized circular external occulters

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Fig. 12

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Cuts of OFPs in logarithmic scale for the 1.50 m external occulter enlarged to 1.53 m with an apodization zone. From top to bottom, the transmission at the edge τ(r) is linear, a cosine bell, and a Sonine with ν = 2, as given in Eq. (19) and shown in Fig. 11.

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