17 February 2022 Optical design of an image-slicer integral field unit with two output slits
Carlos Dominguez-Tagle, Roberto Lopez, Manuel Collados, Jacinto J. Vaz Cedillo
Author Affiliations +
Abstract

The optical design of an integral field unit (IFU) based on image-slicers represents an interesting design exercise because of the small size of the components and the critical parameters to reduce optical aberrations. When the IFU to be designed is also intended to substitute an IFU prototype that is already integrated into a spectropolarimeter, it becomes even more challenging. The main reason to upgrade the IFU prototype is to cover a larger field of view (FOV). One of the work packages of the European project “Getting Ready for the European Solar Telescope” (GREST) had as its objective to find the best option to design such an IFU. After analyzing the requirements and the design considerations, the optical design pointed toward an IFU that doubles the FOV, reaching a value of 40.5  arcsec2. The designed IFU is composed of two image-slicers coupled together, each one with eight mirrors of 1.8  mm  ×  100  μm that feed two slits to the spectrograph.

© 2022 Society of Photo-Optical Instrumentation Engineers (SPIE) 2329-4124/2022/$28.00 © 2022 SPIE
Carlos Dominguez-Tagle, Roberto Lopez, Manuel Collados, and Jacinto J. Vaz Cedillo "Optical design of an image-slicer integral field unit with two output slits," Journal of Astronomical Telescopes, Instruments, and Systems 8(1), 015002 (17 February 2022). https://doi.org/10.1117/1.JATIS.8.1.015002
Received: 1 September 2021; Accepted: 28 January 2022; Published: 17 February 2022
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KEYWORDS
Mirrors

Optical design

Collimators

Cameras

Sensors

Prototyping

Solar telescopes

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