Don Bruder wrote:


The part that grabs my attention (as a wearer of corrective lenses not
in contact with the eyeball) is that whole "scratch resistance" thing...
I'm forever cussing at the cost involved in replacing a set of glasses
due to the "fog" of scratches that sooner or later collect on my lenses,
regardless of how carefully I handle them.

If this stuff can be worked into lenses, I'd be thrilled to have a set
made out of it, since it might *FINALLY* mean I'd get to look through
scratch-free lenses for more than the first few weeks after getting a
new pair...


Isn't Aluminum oxide Sapphire? Don't know what percentage of nitrogen
they are talking about, but if I remember right pure Sapphire (straight
aluminum and oxygen) are transparent- color is due to various
impurities. I know sapphire is used for infrared lenses and windows. I
see no reason similar materials cannot be used for lenses, but one must
check the dispersion charactoristics to see if result would give too
much chromatic aberration.