RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 λ/D

N. Blind; B. Chazelas; J. Kühn; E. Hocini; C. Lovis; M. Beaulieu; T. Fusco; L. Genolet; O. Guyon; J. Hagelberg; I. Hughes; P. Martinez; J. F. Sauvage; R. Schnell; M. Sordet; A. Spang

doi:10.1117/12.2628320

RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 λ/D

N. Blind, B. Chazelas, J. Kühn, E. Hocini, C. Lovis, M. Beaulieu, T. Fusco, L. Genolet, O. Guyon, J. Hagelberg, I. Hughes, P. Martinez, J. F. Sauvage, R. Schnell, M. Sordet, A. Spang

Optical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

RISTRETTO is the evolution of the original idea of coupling the VLT instruments SPHERE and ESPRESSO,¹ aiming at High Dispersion Coronagraphy. RISTRETTO is a visitor instrument that should enable the characterization of the atmospheres of nearby exoplanets in reflected light, by using the technique of high-contrast, high-resolution spectroscopy. Its goal is to observe Prox Cen b and other planets placed at about 35mas from their star, i.e. 2λ/D at λ=750nm. The instrument is composed of an extreme adaptive optics, a coronagraphic Integral Field Unit, and a diffraction-limited spectrograph (R=140.000, λ =620-840 nm). We present the status of our studies regarding the coronagraphic IFU and the XAO system. The first in particular is based on a modified version of the PIAA apodizer, allowing nulling on the first diffraction ring. Our proposed design has the potential to reach ≥ 50% coupling and ≤ 10⁻⁴ contrast at 2λ/D in median seeing conditions.

Original language	English (US)
Title of host publication	Adaptive Optics Systems VIII
Editors	Laura Schreiber, Dirk Schmidt, Elise Vernet
Publisher	SPIE
ISBN (Electronic)	9781510653511
DOIs	https://doi.org/10.1117/12.2628320
State	Published - 2022
Event	Adaptive Optics Systems VIII 2022 - Montreal, Canada Duration: Jul 17 2022 → Jul 22 2022

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	12185
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Adaptive Optics Systems VIII 2022
Country/Territory	Canada
City	Montreal
Period	7/17/22 → 7/22/22

Keywords

HDC
nulling
PIAA
XAO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2628320

Cite this

Blind, N., Chazelas, B., Kühn, J., Hocini, E., Lovis, C., Beaulieu, M., Fusco, T., Genolet, L., Guyon, O., Hagelberg, J., Hughes, I., Martinez, P., Sauvage, J. F., Schnell, R., Sordet, M., & Spang, A. (2022). RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 λ/D. In L. Schreiber, D. Schmidt, & E. Vernet (Eds.), Adaptive Optics Systems VIII Article 1218573 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12185). SPIE. https://doi.org/10.1117/12.2628320

RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 λ/D. / Blind, N.; Chazelas, B.; Kühn, J. et al.
Adaptive Optics Systems VIII. ed. / Laura Schreiber; Dirk Schmidt; Elise Vernet. SPIE, 2022. 1218573 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12185).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Blind, N, Chazelas, B, Kühn, J, Hocini, E, Lovis, C, Beaulieu, M, Fusco, T, Genolet, L, Guyon, O, Hagelberg, J, Hughes, I, Martinez, P, Sauvage, JF, Schnell, R, Sordet, M & Spang, A 2022, RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 λ/D. in L Schreiber, D Schmidt & E Vernet (eds), Adaptive Optics Systems VIII., 1218573, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12185, SPIE, Adaptive Optics Systems VIII 2022, Montreal, Canada, 7/17/22. https://doi.org/10.1117/12.2628320

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RISTRETTO: coronagraph and AO designs enabling High Dispersion Coronagraphy at 2 λ/D

Abstract

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Conference

Keywords

ASJC Scopus subject areas

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