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13 December 2020 Potential optical design of a multi-conjugate adaptive optics instrument based on a modified Offner concentric relay for Gemini North
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Abstract
The Gemini North Adaptive Optics (GNAO) project will deliver the first ground-based Adaptive Optics (AO) facility for wide-field studies on Mauna Kea in Hawaii. This document presents the potential optical design of a Multi-Conjugate Adaptive Optics (MCAO) instrument. In the aim of designing an instrument with enhanced performance, a design based on a Modified Offner Concentric relay is proposed as an alternative option to the pair of unmatched off-axis parabolic mirrors. A diffraction-limited image quality is achieved in the NIR domain over a wide field-of-view of 60-arcsec radius. Petzval field curvature is cancelled and static optical distortion is reduced by a factor of 4 at the image plane. This work shows the Modified Offner Concentric relay is a feasible design for the wide-field AO instrumentation of the 8.1-meter Gemini North telescope.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Emmanuel Chirre, Gaetano Sivo, Julia Scharwaechter, Celia Blain, Marcos Van Dam, and Andrew Rakich "Potential optical design of a multi-conjugate adaptive optics instrument based on a modified Offner concentric relay for Gemini North", Proc. SPIE 11448, Adaptive Optics Systems VII, 114487F (13 December 2020); https://doi.org/10.1117/12.2574810
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