RISTRETTO: the PIAA Nuller in the prototyping phase

N. Restori; N. Blind; J. Kühn; B. Chazelas; C. Lovis; C. Mordasini; M. Shinde; P. Martinez; O. Guyon

doi:10.1117/12.3020051

26 August 2024 RISTRETTO: the PIAA Nuller in the prototyping phase

N. Restori, N. Blind, J. Kühn, B. Chazelas, C. Lovis, C. Mordasini, M. Shinde, P. Martinez, O. Guyon

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131002T (2024) https://doi.org/10.1117/12.3020051
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

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 10⁻⁵ 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.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

N. Restori, N. Blind, J. Kühn, B. Chazelas, C. Lovis, C. Mordasini, M. Shinde, P. Martinez, and O. Guyon "RISTRETTO: the PIAA Nuller in the prototyping phase", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131002T (26 August 2024); https://doi.org/10.1117/12.3020051

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