A light-weight mirror blank assembly, having at least one sheet of corrugated material; and at least one face sheet in intimate contact with a surface of the sheet of corrugated material forming the light-weight mirror blank assembly. The light-weight mirror blank assembly has an areal density less than...http://www.google.fr/patents/US7429114?utm_source=gb-gplus-shareBrevet US7429114 - Light-weight mirror blank assembly
