Design and Manufacture of Low-Absorption ZnS-YF(3) Antireflection Coatings in the 3.5-16-num Spectral Range.
Broadband antireflection coatings on ZnSe substrates are designed and manufactured in the 3.5-16-mum IR range. The thin-film materials are YF(3) and ZnS produced by electron-beam deposition. To reach optimal performances to as great as 16 mum, we performed an accurate determination of complex indices, taking into account dispersion laws and absorption due to water within layers. With this knowledge, designs are optimized and absorption is reduced at 16 mum.
Lemarquis
F
F
Marchand
G
G
Amra
C
C