FRIDA integral field unit laboratory acceptance tests

Salvador Cuevas; Luis C. Álvarez-Núñez; Stephen S. Eikenberry; Oscar Chapa

doi:10.1117/12.3019320

18 July 2024 FRIDA integral field unit laboratory acceptance tests

Salvador Cuevas, Luis C. Álvarez-Núñez, Stephen S. Eikenberry, Oscar Chapa

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 1309697 (2024) https://doi.org/10.1117/12.3019320
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

FRIDA is an infrared (0.9-2.5 μm) imager and integral-field spectrograph that will work in concert with the Gran Telescopio Canarias Adaptive Optics system (GTCAO). It is a diffraction-limited and cryogenic instrument. The image-quality requirements for the complete system (SR>0.9 for the K band) necessitate high-precision manufacturing and quality control for all the optical components, subsystems, and the whole system. All the glass optics were manufactured and tested at the UNAM workshops. The Integral Field Unit is a joint development of the University of Florida and UNAM. The Integral Field Unit is a slicer type based on the University of Florida FISICA. The components were made by diamond turning on a special alloy. Parts of the slicer were manufactured by Corning Specialty Materials and by Durham Precision Optics. The integration of those parts was carried out at the University of Florida. In this presentation, we describe the acceptance tests of the IFU as a system by double path interferometry on a ZYGO instrument and by direct estimation of the Strehl Ratio using a CMOS camera confocal to a microscope. The results show an excellent image quality with Strehl Ratios better than 0.8 at 1064 nm. We also show the first FRIDA Integral field images at cryogenic temperatures.

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

Citation Download Citation

Salvador Cuevas, Luis C. Álvarez-Núñez, Stephen S. Eikenberry, and Oscar Chapa "FRIDA integral field unit laboratory acceptance tests", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 1309697 (18 July 2024); https://doi.org/10.1117/12.3019320

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