RISTRETTO: the PIAA Nuller in the prototyping phase
The objective of the coronagraphic IFU of RISTRETTO is to enable High Dispersion Coronagraphy of planets at a distance of 2λ/D from their star, without compromising on transmission. The new idea of a PIAA Nuller (PIAAN) allows contrast down to 10<sup>−5</sup> over large bandwidth ≥ 25%, with high transmission ≥ 70% at the distance of 2λ/D. While RISTRETTO will be installed on a VLT, this development is of tremendous importance for fully exploiting future ELTs XAO. We will discuss our PIAAN prototyping activities. This covers 1) the characterisation of our 2nd set of IFU bundles, with 3D-printed MLAs; 2) the characterisation of our first PIAA optics; 3) the integration of a high contrast bench, planned for prototyping of Front-End control strategies; 4) the characterisation of the PIAAN system on the bench.
Authors
- Bruno Chazelas
- C. Mordasini (ORCID: https://orcid.org/0000-0002-1013-2811)
- Nicolas Blind (ORCID: https://orcid.org/0000-0003-4232-1999)
- Olivier Guyon (ORCID: https://orcid.org/0000-0002-1097-9908)
- Nathanaël Restori (ORCID: https://orcid.org/0000-0001-5628-5269)
- C. Lovis (ORCID: https://orcid.org/0000-0001-7120-5837)
- Muskan Shinde
- P. Martinez (ORCID: https://orcid.org/0000-0003-2577-0864)
- Jonas G. Kuehn
Institutions
- University of Bern (CH)
- Centre National de la Recherche Scientifique (FR)
- University of Arizona (US)
- National Institutes of Natural Sciences (JP)
- Observatoire de la Côte d’Azur (FR)
- Observatoire Cantonal de Neuchâtel (CH)
- National Astronomical Observatory of Japan (JP)
Publication Details
- Published
- 2024-08-26
- DOI
- https://doi.org/10.1117/12.3020051
- Citations
- 1
- Primary Topic
- Adaptive optics and wavefront sensing
- Type
- article
- Field-Weighted Citation Impact
- 0.34