Design of the ERIS calibration unit

Mauro Dolci; Angelo Valentini; Gianluca Di Rico; Simone Esposito; Debora Ferruzzi; Armando Riccardi; Paolo Spanò; Jacopo Antichi

doi:10.1117/12.2233662

9 August 2016 Design of the ERIS calibration unit

Mauro Dolci, Angelo Valentini, Gianluca Di Rico, Simone Esposito, Debora Ferruzzi, Armando Riccardi, Paolo Spanò, Jacopo Antichi

Author Affiliations +

Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI; 990839 (2016) https://doi.org/10.1117/12.2233662
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Enhanced Resolution Imager and Spectrograph (ERIS) is a new-generation instrument for the Cassegrain focus of the ESO UT4/VLT, aimed at performing AO-assisted imaging and medium resolution spectroscopy in the 1-5 micron wavelength range. ERIS consists of the 1-5 micron imaging camera NIX, the 1-2.5 micron integral field spectrograph SPIFFIER (a modified version of SPIFFI, currently operating on SINFONI), the AO module and the internal Calibration Unit (ERIS CU). The purpose of this unit is to provide facilities to calibrate the scientific instruments in the 1-2.5 micron and to perform troubleshooting and periodic maintenance tests of the AO module (e.g. NGS and LGS WFS internal calibrations and functionalities, ERIS differential flexures) in the 0.5 – 1 μm range. The ERIS CU must therefore be designed in order to provide, over the full 0.5 – 2.5 μm range, the following capabilities: 1) illumination of both the telescope focal plane and the telescope pupil with a high-degree of uniformity; 2) artificial point-like and extended sources onto the telescope focal plane, with high accuracy in both positioning and FWHM; 3) wavelength calibration; 4) high stability of these characteristics. In this paper the design of the ERIS CU, and the solutions adopted to fulfill all these requirements, is described. The ERIS CU construction is foreseen to start at the end of 2016.

Citation Download Citation

Mauro Dolci, Angelo Valentini, Gianluca Di Rico, Simone Esposito, Debora Ferruzzi, Armando Riccardi, Paolo Spanò, and Jacopo Antichi "Design of the ERIS calibration unit", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990839 (9 August 2016); https://doi.org/10.1117/12.2233662

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