AO4ELT5 Proceedings

Exploring MAORY performances through tolerance analysis

Patti, Mauro (Università di Bologna - INAF Osservatorio Astronomico di Bologna), Lombini, Matteo (INAF Osservatorio Astronomico di Bologna), Diolaiti, Emiliano (INAF Osservatorio Astronomico di Bologna), Cortecchia, Fausto (INAF Osservatorio Astronomico di Bologna), Ciliegi, Paolo (INAF Osservatorio Astronomico di Bologna)

MAORY is the E-ELT first-light AO module that aims to provide multi-conjugate and single-conjugate adaptive optics compensation for the MICADO high-angular resolution infrared camera and spectrograph. The system performances must achieve diffraction limited image quality and very low geometric distortion. The goal of this paper is to identify, from a purely opto-mechanical point of view, the manufacturing and integration errors that could affect the astrometry and wavefront error requirements. We have performed a preliminary tolerance analysis on two optical designs that differ from having pure conical mirrors or non-zero aspherical terms for mirror surfaces. Following a Monte Carlo approach, we focused on the analysis of the expected performances, defining the advantages of the alternative design with aspherical terms for mirror surfaces.

DOI: 10.26698/AO4ELT5.0019- Proceeding PDF

Back to proceedings list