CaNaPy facility: opto-mechanical design and requirements for optimal visible systems LGS-AO

CaNaPy is an LGS-AO facility that will be used to explore experimentally new schemes for visible adaptive optics corrections. With the CaNaPy facility, in the coming years, we shall explore and demonstrate optimal LGS-AO performances at visible wavelengths, operation also in harsh seeing conditions including daytime LGS-AO, and derivation of atmospheric tip-tilt from the LGS itself, using the time-delay method in monostatic configuration. The CaNaPy TRL6 facility will be installed at the Dome Coude focus of the ESA Optical Ground Station 1m telescope, in Tenerife - Canary Islands. CaNaPy, in collaboration with ESA, has provisions installed to add an infrared optical feeder link system for experiments on satellite communication experiments, fully precompensated and co-propagated with the sodium laser uplink beam. The optomechanical design of CaNaPy is based on a modular approach that provides an open architecture of the system. The modular approach allows independent construction and further modifications of functional blocks of the CaNaPy system in alignment with operational and experimental requirements. We present the optomechanical design of all of the optical parts involved in view of the requirements of the CaNaPy system. The design of individual blocks reflects the overall optical requirements and also considers different alignment strategies of the optics. We provide an overview of the optical design and a description of the optomechanics used in the individual blocks.