MORFEO @ ELT: optomechanical design of test alignment camera

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Abstract
MORFEO (Multi-conjugate adaptive Optics Relay For ELT Observations) is the post-focal adaptive optics module for the ESO Extremely Large Telescope (ELT). The instrument provides MCAO correction for two instruments: MICADO and HARMONI. The TAC (Test and Alignment Camera) is a piece of equipment that will be installed inside the MES (MICADO Emulating Structure), under the LOR (Low Order and Reference Wavefront Sensor): its main function is to simulate and verify all the requirements regarding the interface between MORFEO and MICADO in the Bologna Integration Hall, before the whole system is sent to the ELT in Chile. The TAC is subdivided into a Stage system, equipped with three linear stages – one for each axis – to precisely control the position of the assembly in space, and a Camera system, an Aluminium plate housing sensors and the necessary opto-mechanics. This paper focuses on the optomechanical design of the TAC, presenting how challenges were overcome and the choice of equipment.

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