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Development of the MICADO Flat-field and Wavelength Calibration Unit: From Design to Prototyping.

Authors :
Rodeghiero, Gabriele
Häberle, Maximilian
Sauter, Jonas
Sawczuck, Miriam
Pott, Jörg-Uwe
Münch, Norbert
Ramos, José Ricardo
Naranjo, Vianak
Kausch, Wolfgang
Sabha, Nadeen B.
Biancalani, Enrico
Barboza, Santiago
Bizenberger, Peter
Rohloff, Ralf-Rainer
Müller, Friedrich
Hofferbert, Ralph
Mohr, Lars
Neumann, Udo
Seemann, Ulf
Schäfer, Sebastian
Source :
Publications of the Astronomical Society of the Pacific. Dec2020, Vol. 132 Issue 1018, p1-22. 22p.
Publication Year :
2020

Abstract

We describe the evolution and the analysis of the design that led to the development of the Flat-field and wavelength Calibration Unit (FCU) for the Multi-AO Imaging CAmera for Deep Observations (MICADO) instrument. MICADO will be one of the first light instruments of the Extremely Large Telescope. The FCU challenge in terms of calibration is related to the large size of the MICADO entrance and final focal plane, ∼200 mm × 200 mm. Such a focal plane scale and its segmentation in 3 × 3 detectors, require significant design modifications with respect to the calibration units of the current and past generation of instruments. The design analysis and ray tracing calculations are complemented with the test and verification of lab prototypes to assess the reliability of the FCU architecture in terms of flat-field illumination uniformity and signal to noise, spectral calibration line coverage and radial velocity stability of the wavelength solution provided to the instrument. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00046280
Volume :
132
Issue :
1018
Database :
Academic Search Index
Journal :
Publications of the Astronomical Society of the Pacific
Publication Type :
Academic Journal
Accession number :
147102589
Full Text :
https://doi.org/10.1088/1538-3873/abbff3