+86 21 51012729
info@bbotech.com
Related link: BaF2 Lenses 
BaF2 特性と透過曲線
フッ化バリウム (BaF2) は、紫外、可視、赤外スペクトル領域で使用することができます。フッ化バリウムは0.25 と9.5 µm の間の 90% の上の伝達を有する。
フッ化バリウムは、フッ化カルシウムと同じくらい硬く、さらに熱衝撃を受けやすい。しかし、それは一般的に低温冷却熱画像システムで使用されています。それは、フッ化カルシウムよりもやや高価であり、大きなサイズで容易に利用可能ではありません。
|
Property |
Specification |
|
Transmission Range |
0.15µm to 12.5µm |
|
Density |
4.89 g/cm3 |
|
Thermal Expansion |
18.1×10-6 /°C @ 20°C+/-100°C |
|
Surface Finish |
Polishes of 20-10 scratch-dig are mostly specified for use in UV & visible applications. Typical specifications for surface quality in the infrared are a 40-20 scratch dig in the 0.75 to 3µm spectral region & 60-40 scratch-dig for the 3-7µm area. BaF2 is diamond tunable. |
|
Surface Figure |
Surface figure of a 1/10 wave to 1/2 wave @ 0.6328µm are specified mostly on lenses for ultraviolet & visible use. In the infrared, typical required surface figure ranges from 1/2 wave to 2 waves 0.6328µm depending on the system performance requirements. |
|
AR Coating Options |
Typical available coatings for BaF2 include BBAR for 0.8 to 2.5µm, 3 to 5µm or the 1 to 5µm spectral regions. |
|
Typical Applications |
Cryogenically cooled thermal imaging, Astronomical, Laser applications. |
|
Products Manufactured |
Lenses, Aspheric lenses, Windows, Optical Beamsplitters, Optical Filters, Wedges, Prisms. |
|
Wavelength (µm) |
Index of Refraction (n) |
|
1.700 |
1.466 |
|
2.152 |
1.464 |
|
3.422 |
1.459 |
|
4.000 |
1.455 |
|
6.238 |
1.442 |
|
7.268 |
1.433 |
|
10.346 |
1.396 |
