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All Products / Optics / Windows and Diffusers / UV and IR Windows / ISP Optics Barium Fluoride (BaF2) Wedged Windows
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25.4mm Dia., 4mm Thick, 30' Wedge, ISP Optics Barium Fluoride (BaF2) Wedged Window | BF-WW-25-4

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Barium Fluoride (BaF2) Wedged Windows

Barium Fluoride (BaF<sub>2</sub>) Wedged Windows
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Abbe Number (vd):
81.78
Bevel:
Protective as needed
Clear Aperture (%):
85
Clear Aperture CA (mm):
21.59
Diameter (mm):
25.40 +0.00/-0.13
Thickness (mm):
4.00 ±0.13
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
18.1
Density (g/cm3):
4.89
Edges:
Fine Ground
Index of Refraction nd:
1.478 @ 0.5μm
1.451 @ 5μm
1.401 @ 10μm
Knoop Hardness (kg/mm2):
82
Poisson's Ratio:
0.343
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Barium Fluoride (BaF2)
Surface Flatness (P-V):
2λ @ 633nm
Surface Quality:
60-40
Type:
Protective Window
Wavelength Range (nm):
200 - 12000
Young's Modulus (GPa):
53
Wedge Angle:
30±15 arcmin
Model Number:
BF-WW-25-4

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 240:
Compliant
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Product Family Description

ISP Optics Barium Fluoride (BaF2) Wedged Windows feature a 30 arcmin wedge to eliminate etalon effects, improving readout in detection and spectroscopy applications. With a low index of refraction of 1.48, these windows provide high transmission from 200nm to 12μm without the need of an anti-reflection (AR) coating. Barium fluoride windows can be used up to 800°C in a dry environment, but prolonged exposure to moisture can degrade transmission in the vacuum ultraviolet range. ISP Optics Barium Fluoride (BaF2) Wedged Windows are ideal for infrared spectroscopy, thermal imaging, and general UV-IR detection applications. Barium fluoride is also a fast scintillator and can be used for the detection X-rays, gamma rays, or other high energy particles.

Note: These optical windows are very sensitive to thermal shock.