Patent ID: 6881489

Claim:
A reflecting mirror comprising a sheet of an alkali metal-zinc-borosilciate glass bonded to a reflecting surface, the glass sheet having a thickness less than 0.5 mm, and being doped with Nd 2 O 3 to substantially reduce the spectral transmission of the glass in the wavelength range of 565-595 nm, wherein the alkali metal-zinc-borosilicate glass consists essentially, by weight percent on an oxide basis, of SiO 2 55-70% Al 2 O 3 0.5-4.5% B 2 O 3 6-14% ZnO 3-10% Na 2 O 5-11% K 2 O 2-9% Na 2 O + K 2 O 7-20% Nd 2 O 3 5-10%.