25.4mm Dia., 1mm Thick, Uncoated, ISP Optics IR Fused Silica Window | QI-W-25-1

Product Details Excellent Thermal Stability Low Auto-Fluorescence IR Grade Fused Silica ISP Optics Fused Silica Windows feature high transmission across the Ultraviolet (UV), Visible (VIS), and Infrared (IR) spectrum with IR Grade substrates extending up to 3500nm with no absorption bands. Fused Silica is a commonly used material for precision optics due to its consistent and repeatable optical performance. In addition, fused silica features a low coefficient of thermal expansion that provides high thermal stability and resistance to thermal shock. ISP Optics Fused Silica Windows provide extremely low fluorescence, making them ideal for a wide range of UV and IR laser applications. Specifications General Model Number: QI-W-25-1 Type: Protective Window Type of Window: Glass Physical & Mechanical Properties Clear Aperture CA (mm): 21.59 Diameter (mm): 25.40 +0.00/-0.13 Thickness (mm): 1.00 ±0.13 Parallelism (arcmin): <3 Bevel: Protective as needed Clear Aperture (%): 85 Edges: Fine Ground Poisson's Ratio: 0.16 Young's Modulus (GPa): 73 Knoop Hardness (kg/mm 2 ): 522.00 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Fused Silica Index of Refraction (n d ): 1.458 Surface Quality: 40-20 Abbe Number (v d ): 67.8 Wavelength Range (nm): 200 - 3500 Surface Flatness (P-V): 1λ Material Properties Density (g/cm 3 ): 2.20 Coefficient of Thermal Expansion CTE (10 -6 /°C): 0.52 (+5 to +35°C) 0.57 (0 to +200°C) 0.48 (-100 to +200°C) Fused Silica Grade: 7979 0G Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×