The extreme ultraviolet imager of solar orbiter: optical design and alignment scheme

J.-P. Halain; A. Mazzoli; S. Meining; P. Rochus; E. Renotte; F. Auchère; U. Schühle; F. Delmotte; C. Dumesnil; A. Philippon; R. Mercier; A. Hermans

doi:10.1117/12.2185631

21 September 2015 The extreme ultraviolet imager of solar orbiter: optical design and alignment scheme

J.-P. Halain, A. Mazzoli, S. Meining, P. Rochus, E. Renotte, F. Auchère, U. Schühle, F. Delmotte, C. Dumesnil, A. Philippon, R. Mercier, A. Hermans

Author Affiliations +

Proceedings Volume 9604, Solar Physics and Space Weather Instrumentation VI; 96040H (2015) https://doi.org/10.1117/12.2185631
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The Extreme Ultraviolet Imager (EUI) is one of the remote sensing instruments on-board the Solar Orbiter mission. It will provide dual-band full-Sun images of the solar corona in the extreme ultraviolet (17.1 nm and 30.4 nm), and high resolution images of the solar disk in both extreme ultraviolet (17.1 nm) and vacuum ultraviolet (Lyman-alpha 121.6 nm). The EUI optical design takes heritage of previous similar instruments. The Full Sun Imager (FSI) channel is a single mirror Herschel design telescope. The two High Resolution Imager (HRI) channels are based on a two-mirror optical refractive scheme, one Ritchey-Chretien and one Gregory optical design for the EUV and the Lyman-alpha channels, respectively. The spectral performances of the EUI channels are obtained thanks to dedicated mirror multilayer coatings and specific band-pass filters. The FSI channel uses a dual-band mirror coating combined with aluminum and zirconium band-pass filters. The HRI channels use optimized band-pass selection mirror coatings combined with aluminum band-pass filters and narrow band interference filters for Lyman-alpha. The optical performances result from accurate mirror manufacturing tolerances and from a two-step alignment procedure. The primary mirrors are first co-aligned. The HRI secondary mirrors and focal planes positions are then adjusted to have an optimum interferometric cavity in each of these two channels. For that purpose a dedicated alignment test setup has been prepared, composed of a dummy focal plane assembly representing the detector position. Before the alignment on the flight optical bench, the overall alignment method has been validated on the Structural and Thermal Model, on a dummy bench using flight spare optics, then on the Qualification Model to be used for the system verification test and qualifications.

Citation Download Citation

J.-P. Halain, A. Mazzoli, S. Meining, P. Rochus, E. Renotte, F. Auchère, U. Schühle, F. Delmotte, C. Dumesnil, A. Philippon, R. Mercier, and A. Hermans "The extreme ultraviolet imager of solar orbiter: optical design and alignment scheme", Proc. SPIE 9604, Solar Physics and Space Weather Instrumentation VI, 96040H (21 September 2015); https://doi.org/10.1117/12.2185631

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Mirrors

Sensors

Optical alignment

Extreme ultraviolet

Interferometry

Imaging systems

Optical design

Show All Keywords

Keywords/Phrases

Search In:

Publication Years