BaF₂ Windows/Lenses
Material:
BaF₂
Thickness:
+/-0.2mm
Surface Flatness:
N<λ/2
Coating:
Uncoated,
AR/AR@3-5um, Ravg<2.0%
Diameter Tolerance:
+0.0, -0.1mm
Surface Quality:
60/40~40/20
Parallelism:
<1’
Barium fluoride’s properties are similar to those of calcium fluoride, but it offers the benefit that it is more resistant to high energy radiation. It is, however, less resistant to water damage. Pronounced degradation of the BaF₂ substrate occurs at 500 °C when exposed to water, but in dry environments, it can be used in applications requiring exposure to temperatures up to 800 °C. The crystal orientation for these windows is random.
wdt_ID Attributes Value
1
Material
BaF₂
18
Diameter Tolerance
+0.0,-0.1mm
19
Thickness
+/-0.2mm
20
Surface Quality
60/40~40/20
21
Surface Flatness
N＜λ/2
22
Parallelism
＜1 arc Min
23
Coating
Uncoated,
AR/AR@3-5um, Ravg＜2.0%
| wdt_ID | Attributes | Value |
|---|---|---|
| 1 | Material | BaF₂ |
| 18 | Diameter Tolerance | +0.0,-0.1mm |
| 19 | Thickness | +/-0.2mm |
| 20 | Surface Quality | 60/40~40/20 |
| 21 | Surface Flatness | N＜λ/2 |
| 22 | Parallelism | ＜1 arc Min |
| 23 | Coating | Uncoated, AR/AR@3-5um, Ravg＜2.0% |
| wdt_ID | Part No. | Material | S/D | dia (mm) | Thickness | Coating |
|---|---|---|---|---|---|---|
| 27 | WIN81272 | BaF₂ | 60/40 | 12.7 | 2.0 | None |
| 90 | WIN82543 | BaF₂ | 60/40 | 25.4 | 3.0 | None |
| 199 | WIN8403 | BaF₂ | 60/40 | 40.0 | 3.0 | None |
| 200 | WIN8503 | BaF₂ | 60/40 | 50.0 | 3.0 | None |
Related Resource for reference
Overview
• Transmittance of IR glasses
• Comparison IR vs. Visible glasses
• Properties of some common IR glasses
– Germanium
– Silicon
– Zinc Sulfide
– Zinc Selenide
– Magnesium Fluoride
– Sapphire
• Concerns using lens design programs
• References OPTI 521 2
Materials for Infrared Optics
Related Products
Zinc Selenide (ZnSe) Windows / Lenses
Silicon Windows/Lenses
Germanium Windows/Lenses
