38.1mm Dia., 2mm Thick, Uncoated, ISP Optics Barium Fluoride (BaF 2 ) Window | BF-W-38-2

Product Details Excellent Transmission from 0.2 – 12μm Resistant to High-Energy Radiation High Transmission without AR Coatings ISP Optics Barium Fluoride (BaF 2 ) Windows provide excellent transmission from 0.2- 12μm without the need for an Anti-Reflection (AR) coating due to its low index of refraction. Barium Fluoride has similar physical properties to Calcium Fluoride, but features higher resistance to high-energy radiation. This makes Barium Fluoride ideal for vacuum UV (VUV) applications such as thermography or laser spectroscopy where high radiation resistance is required. ISP Optics Barium Fluoride (BaF 2 ) Windows can be used up to 800°C in a dry environment, but prolonged exposure to moisture can degrade transmission in the ultraviolet range. Note: These optical windows are very sensitive to thermal shock. Specifications General Model Number: BF-W-38-2 Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Clear Aperture CA (mm): 32.38 Diameter (mm): 38.10 +0.00/-0.13 Thickness (mm): 2.00 ±0.13 Parallelism (arcmin): <3 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 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 ): 1.48 Surface Quality: 40-20 Abbe Number (v d ): 81.78 Axis Orientation: Random Wavelength Range (nm): 200 - 12000 Surface Flatness (P-V): 2λ Material Properties Density (g/cm 3 ): 4.89 Coefficient of Thermal Expansion CTE (10 -6 /°C): 18.1 Environmental & Durability Factors Operating Temperature (°C): Maximum: 800 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×