MMP, the Multi Mini Prism device for ESPRESSO APSU: prototyping and integration

The multi mini prism device is a crucial component of the Espresso Anamorphic Pupil Slicer (APSU). At the end of the slicer, is necessary to differently fold each field to correctly illuminate the echelle and this is made by cylindrical prisms glued onto a silica window. We present the integrated robotic system conceived to reach the required tolerances in term of alignment and integration. It consists in a tip/tilt stage to select the wedge angle, a rotational stage to select the right clock angle, coupled to an x-y stage to position the elements on the window and a z axis to perform the gluing.