IT is reported from Italy that three optical prisms formerly belonging to Sir ... It is made of flint glass, and confirmatory evidence of its date has been adduced from the nature of the glass.

and unlike the cheap triangular prisms you can find online for about ten bucks, Fractals Filters filters have lead oxide in the glass for better optical resolution which Nikk claims will give the ...

“The SPIE Catalyst Award, in its second year, celebrates organizations that make significant contributions to environmental sustainability,” announced SPIE. “Schott’s pioneering efforts in ...