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AssigneeCorning Incorporated
InventorsLovell Elgin Comstock II, Joseph Charles Crifasi, Stephen Polczwartek, Leonard Gerard Wamboldt, Kenneth Smith Woodard
Estimating the term…
A low density substrate material for reflecting optics. The substrate material is a magnesium alloy or composite material that is capable of being finished by diamond turning to form an optically smooth surface with low root-mean-square roughness. The finish quality of the diamond-turned surface is sufficiently good to permit use of the magnesium material as a substrate for a reflecting optic without further processing. The magnesium substrate material contains at least 80 wt % Mg and may also include Al, Si and/or other elements. The density of the magnesium substrate material is much lower than the density of current Al alloy substrate materials.
A process for fabricating a reflecting optic comprising:
A reflecting optic comprising a substrate, said substrate comprising at least 80 wt % magnesium, said substrate having a diamond-turned surface, said diamond-turned surface having a root-mean-square roughness of less than 150 Å.
Dependencies are inferred from the claim text.