From tetrahedral to box: design philosophy behind the Cranfield Big OptiX system

摘要

We introduce the design philosophy behind a new ultra precise large optics grinding machine: the Big OptiX machine or BOX' explaining how it emerged from the Tetraform concept. Extra Large Telescopes (ELTs) will require large optics of high accuracy - in quantity. Our goal is for a machine with very high dynamic loop stiffness, unprecedented at this scale, enabling ultra precise large free-form optics to be rapidly ground within a serial production environment; low levels of induced sub-surface damage will reduce processing time for subsequent finishing.