HARMONI at ELT: Prototyping for Single-Conjugate AO Sensor subsystem

被引：0

作者：

El Hadi, K. ^{[1
]}

Sauvage, J. F. ^{[1
,2
]}

Dohlen, K. ^{[1
]}

Renault, E. ^{[1
]}

Bon, W. ^{[1
]}

Vola, P. ^{[1
]}

Crauchet, T. ^{[1
]}

Guemerle, L. ^{[1
]}

Madec, F. ^{[1
]}

Le Mignant, D. ^{[1
]}

Neichel, B. ^{[1
]}

Fusco, T. ^{[1
,3
]}

Clarke, F. ^{[4
]}

Melotte, D. ^{[5
]}

Tecza, M. ^{[4
]}

Thatte, N. ^{[4
]}

Amiaux, J. ^{[6
]}

Paufique, J. ^{[6
]}

机构：

[1] Aix Marseille Univ, CNRS, Lab Astrophys Marseille, CNES,UMR 7326, F-13388 Marseille, France

[2] DOTA, ONERA, F-13661 Salon, France

[3] Univ Paris Saclay, DOTA, ONERA, F-91123 Palaiseau, France

[4] Univ Oxford, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[5] Royal Observ Edinburgh, UK Astron Technol Ctr, Blackford Hill, Edinburgh, Midlothian, Scotland

[6] ESO, Karl Schwarzschild Str, D-285748 Garching, Germany

来源：

ADAPTIVE OPTICS SYSTEMS VIII | 2022年 / 12185卷

基金：

欧盟地平线“2020”;

关键词：

ELT HARMONI; Adaptive Optics; SCAO; Wave-Front Sensing; Pyramid; modulator; Tip-Tilt Mechanism;

D O I：

10.1117/12.2628876

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 450nm to 2450nm with resolving powers from 3500 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 SCAO Sensors subsystem (SCAOS) is located within the Natural Guide Star Sensors (NGSS) system which includes several wavefront sensors (WFS) to cover the needs of the different HARMONI observing modes and operates in a cold, thermally stabilized (+2 degrees C) and dry gas environment for thermal background limitation. To reach the required performance, the SCAOS will use different modules and mechanisms among which, two particularly critical devices have been prototyped and are tested: The SCAOS Pyramid Modulator Unit (SPMU) and the SCAOS Object Selection Mechanism (SOSM). Both devices are tip-tilt mirrors but have very different specifications (amplitude and speed). In this work, we will present and discuss the design, the assembly and the full test (performance, control) of the two systems, in both ambient and cold environments.

引用

页数：11

共 23 条

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[22] Dual-channel multiple natural guide star wavefront sensor for the E-ELT multi-conjugate adaptive optics module
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[23] Perturbation analysis of conjugate MI-ESPRIT for single acoustic vector-sensor-based noncircular signal direction finding
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SIGNAL PROCESSING, 2007, 87 (07) : 1597 - 1612

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