Game-changing approaches to affordable advanced lightweight mirrors II: new cases analyzed for extreme ZERODUR lightweighting and relief from the classical polishing parameter constraint

摘要

Previously we established that the combination of new machining parameters for openbackedmonolithic lightweighted ZERODUR? mirror substrates, coupled with new methods for opticalfinishing of aggressively lightweighted mirrors, have relieved classical mirror design constraints imposedupon 1.2m diameter lightweight mirrors. We demonstrate that openback mirror substrates now offercomparable mass, Eigenfrequency and substructure print-through performance to the sandwich-mirrorarchitecture, but with considerably less manufacturing effort than for sandwich mirrors. Here we extendthe analyses of the first paper from 1.2m diameter down to 0.6m in diameter and up to 2.4m diameter and4m diameter mirrors.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.