25.4mm Dia., 4mm Thick, 30′ Wedge, ISP Optics Barium Fluoride (BaF 2 ) Wedged Window | BF-WW-25-4

Product Details 30 Arcmin Wedge Excellent Transmission from 200nm – 12μm Resistant to High-Energy Radiation Precision Flat Barium Fluoride (BaF­ 2­­ ) Windows Also Available ISP Optics Barium Fluoride (BaF 2 ) 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 (BaF 2 ) 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. Specifications General Model Number: BF-WW-25-4 Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Clear Aperture CA (mm): 21.59 Diameter (mm): 25.40 +0.00/-0.13 Thickness (mm): 4.00 ±0.13 Bevel: Protective as needed Clear Aperture (%): 85 Edges: Fine Ground Poisson’s Ratio: 0.34 Young’s Modulus (GPa): 53 Knoop Hardness (kg/mm 2 ): 82.00 Wedge Angle (arcmin): 30±15 arcmin Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Barium Fluoride (BaF 2 ) Index of Refraction (n d ): 1.478 @ 0.5μm 1.451 @ 5μm 1.401 @ 10μm Surface Quality: 60-40 Abbe Number (v d ): 81.78 Wavelength Range (nm): 200 – 12000 Surface Flatness (P-V): 2λ @ 633nm Material Properties Density (g/cm 3 ): 4.89 Coefficient of Thermal Expansion CTE (10 -6 /°C): 18.1 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×