Updated optical design and trade-off study for MOONS, the Multi-Object Optical and Near Infrared spectrometer for the VLT
E. Oliva, S. Todd, M. Cirasuolo, H. Schnetler, D. Lunney, P. Rees, A., Bianco, E. Diolaiti, D. Ferruzzi, M. Fisher, I. Guinouard, M. Iuzzolino, I., Parry, X. Sun, A. Tozzi, F. Vitali

TL;DR
This paper details the updated optical design of MOONS, a multi-object spectrograph for the VLT, including a comprehensive trade-off analysis of key optical components to optimize performance.
Contribution
It provides the latest optical design and a systematic trade-off study of collimators, cameras, dichroics, and filters for MOONS, enhancing its performance and feasibility.
Findings
Optimized optical component configurations for MOONS
Trade-off analysis results guiding component selection
Enhanced design performance for multi-object spectrographs
Abstract
This paper presents the latest optical design for the MOONS triple-arm spectrographs. MOONS will be a Multi-Object Optical and Near-infrared Spectrograph and will be installed on one of the European Southern Observatory (ESO) Very Large Telescopes (VLT). Included in this paper is a trade-off analysis of different types of collimators, cameras, dichroics and filters.
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