HARMONI at ELT: tolerance analysis and expected as-build imaging performance of the infrared spectrograph

Eduard R. Muslimov; Edgar Castillo-Domínguez; James Kariuki; Jorge Chao-Ortiz; Matthias Tecza; Elliot Meyer; Zeynep Ozer; Fraser Clarke; Niranjan Thatte

doi:10.1117/12.3020119

18 July 2024 HARMONI at ELT: tolerance analysis and expected as-build imaging performance of the infrared spectrograph

Eduard R. Muslimov, Edgar Castillo-Domínguez, James Kariuki, Jorge Chao-Ortiz, Matthias Tecza, Elliot Meyer, Zeynep Ozer, Fraser Clarke, Niranjan Thatte

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130964W (2024) https://doi.org/10.1117/12.3020119
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 470nm to 2450nm with resolving powers from 3300 to 18000 and spatial sampling from 60mas to 4mas. It can operate in two Adaptive Optics modes - SCAO (including a High Contrast capability) and LTAO - or with NOAO. The project is preparing for Final Design Reviews. The integral field spectrograph is a key subsystem of HARMONI instrument, which forms the 2D spectral image and projects it onto the scientific detector. It has 40 operational modes with different platescales and gratings covering the band of 811-2450 nm with three resolution grades. In each of this configurations the as-built spectrograph wavefront error is strictly limited. We perform the sensitivity analysis for measurable and unknown errors and build the errors budget on this basis. Then we correct the values for the actual technological limits and perform a three-stage Monte-Carlo analysis combined with simulation of a few specific effect as the holographic grating wavefront error. Eventually, we show that it is possible to reach the target image quality in terms of the wavefront error and spectral resolution for the entire sub-system with practically feasible tolerances on design parameters.

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

Citation Download Citation

Eduard R. Muslimov, Edgar Castillo-Domínguez, James Kariuki, Jorge Chao-Ortiz, Matthias Tecza, Elliot Meyer, Zeynep Ozer, Fraser Clarke, and Niranjan Thatte "HARMONI at ELT: tolerance analysis and expected as-build imaging performance of the infrared spectrograph", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130964W (18 July 2024); https://doi.org/10.1117/12.3020119

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available