Barium Fluoride (BaF2)
Barium Fluoride (BaF2) is similar to Calcium Fluoride in it's properties and is used for optical windows, lenses, and prisms, particularly when transmission into the ultraviolet is desired. The transmission range is from 0.2m m to 11m m. Transmission in the VUV is degraded by prolonged exposure to a moist atmosphere, but it is not significantly degraded by exposure to high energy radiation.Barium Fluoride is less resistant to attack by water than Calcium Fluoride but attack does not begin until 500
0C. In the dry atmosphere Calcium Fluoride can be used up to 8000C. Barium Fluoride is the most resistant fluoride to high energy radiation but does not have the VUV transmission of other types. The material is very sensitive to thermal shock.Physical Properties:
| Crystal type | cubic |
| Density | 5.27g/cm3 |
| Melting point | 1525 °C |
| Refractive index | n = 1.512 @ 0.265 mm n = 1.396 @ 10.3 mm |
OpticsLand™ manufactures BaF2 lenses, prisms, windows, mirrors etc. Examples of BaF2 optical components are shown below. Please contact OpticsLand for other sizes or specifications.
General Specifications:
| Surface Quality | 60 - 40 scratch & dig |
| Clear aperture | 90% of diameter |
| Diameter tolerance | +0.0, -0.13 mm |
| Flatness | l/4 @ 633 nm |
| Component | Diameter, mm |
Focal Length, mm |
Cat.-No. |
Price, $ |
| plano-convex lens |
25.0 |
50 |
40601 |
160 |
250 |
40603 |
130 | ||
1000 |
40605 |
130 |
||
| plano-concave lens | 25.0 |
-100 |
40607 |
135 |
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