Multi-Spectral Transparent Materials Technologies - The American ...
Multi-Spectral Transparent Materials Technologies - The American ...
Multi-Spectral Transparent Materials Technologies - The American ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Transmittance (%)<br />
100<br />
80<br />
60<br />
40<br />
20<br />
0<br />
<strong>Transparent</strong> Polycrystalline Alumina Could Replace<br />
Sapphire in Some Infrared-Only Applications<br />
• Krell et al, Fraunhofer Institute,<br />
reported infrared transparent Al2 with 0.5 μm grain size in 2003<br />
• Properties similar to sapphire<br />
• Can be made into shapes ―<br />
impractical for sapphire<br />
Sapphire 2.6 mm thick<br />
O 3<br />
Alumina<br />
1.02 mm thick<br />
5.00 mm thick<br />
CeraNova<br />
0.0 0.5 1.0 1.5 2.0 2.5<br />
Wavelength (μm)<br />
(1 mm thick)<br />
Alumina<br />
CeraNova [M. V. Parish & M. R. Pascucci, Proc. SPIE 2009, 7302, 730205]<br />
Polished Hemisphere<br />
(2 mm thick)<br />
Unfinished Dome<br />
27
Change language