Benefits of adding radial phase dimples on scalar coronagraph phase masks
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866914862132625408 |
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| author | Desai, Niyati Mawet, Dimitri Serabyn, Eugene Ruane, Garreth Bertrou-Cantou, Arielle Llop-Sayson, Jorge Riggs, A J Eldorado |
| author_facet | Desai, Niyati Mawet, Dimitri Serabyn, Eugene Ruane, Garreth Bertrou-Cantou, Arielle Llop-Sayson, Jorge Riggs, A J Eldorado |
| contents | Current scalar coronagraph focal plane mask designs are performance-limited by chromaticity. We investigate the effects of adding central Roddier and dual zone phase dimples to scalar vortex masks to improve broadband performance by suppressing the chromatic stellar leakage. We present hybrid designs with radial phase dimples integrated with the sawtooth vortex, wrapped vortex, and cosine phase mask. We show that using these dimples, it is possible to substantially improve the broadband contrast performance of scalar phase masks. We also show that although adding a phase dimple does not increase the sensitivity to low-order aberrations, suppressing the central leakage of scalar vortex coronagraphs does not restore the aberrations sensitivities to their notional state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_05146 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Benefits of adding radial phase dimples on scalar coronagraph phase masks Desai, Niyati Mawet, Dimitri Serabyn, Eugene Ruane, Garreth Bertrou-Cantou, Arielle Llop-Sayson, Jorge Riggs, A J Eldorado Instrumentation and Methods for Astrophysics Current scalar coronagraph focal plane mask designs are performance-limited by chromaticity. We investigate the effects of adding central Roddier and dual zone phase dimples to scalar vortex masks to improve broadband performance by suppressing the chromatic stellar leakage. We present hybrid designs with radial phase dimples integrated with the sawtooth vortex, wrapped vortex, and cosine phase mask. We show that using these dimples, it is possible to substantially improve the broadband contrast performance of scalar phase masks. We also show that although adding a phase dimple does not increase the sensitivity to low-order aberrations, suppressing the central leakage of scalar vortex coronagraphs does not restore the aberrations sensitivities to their notional state. |
| title | Benefits of adding radial phase dimples on scalar coronagraph phase masks |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2309.05146 |