Patent ID: 7429114

Claim:
A light-weight mirror blank assembly, comprising: a) one sheet of corrugated material made of glass; and b) at least one face sheet made of identical glass attached to a surface of the sheet of corrugated material forming the light-weight mirror blank assembly, wherein the light-weight mirror blank assembly has an areal density less than an equivalent blank assembly having a solid support structure for supporting a mirrored surface, and the one sheet of corrugated material comprising, in a first cross-section, a first continuous single line of round peaks connected to round valleys that substantially forms a first sine wave-like configuration, and in a second cross-section, a second continuous single line of round peaks connected to round valleys that substantially forms a second sine wave-like configuration, wherein the first cross-section is oriented transversely to the second cross-section, and the round peaks form a hexagonal array of round peaks on the surface of the at least one face sheet.