40mm Dia., 4mm Thick, NIR I Coated λ/10 Fused Silica Window

Product Details UV, Visible, and NIR Anti-Reflection Coated Versions Available λ/10 Transmitted Wavefront Distortion Circular and Square Sizes from 2mm to 150mm 1λ or λ/4 UV Fused Silica Windows Also Available TECHSPEC λ/10 UV Fused Silica Windows feature laser-grade surface quality and parallelism. In addition, these windows will limit the transmitted wavefront distortion to λ/10. The superior transmission characteristics, excellent thermal properties, and high tolerance manufacturing specifications make these windows an excellent choice for more demanding applications. TECHSPEC λ/10 UV Fused Silica Windows are available for purchase in circular and square sizes ranging from 2mm to 150mm.. These windows are offered uncoated or with anti-reflection coatings optimized for the UV or visible spectrum. Specifications General Type: Protective Window Type of Window: Glass Physical & Mechanical Properties Clear Aperture CA (mm): 32.00 Diameter (mm): 40.00 +0.00/-0.20 Thickness (mm): 4.00 ±0.10 Dimensional Tolerance (mm): +0.00/-0.20 Bevel: Protective as needed Clear Aperture (%): 80 Edges: Fine Ground Parallelism (arcsec): <5 Poisson's Ratio: 0.16 Young's Modulus (GPa): 73 Knoop Hardness (kg/mm 2 ): 522.00 Optical Properties Coating: NIR I (600-1050nm) Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Fused Silica (Corning 7980) Index of Refraction (n d ): 1.458 Surface Quality: 20-10 Transmitted Wavefront, P-V: λ/10 Abbe Number (v d ): 67.8 Coating Specification: R avg ≤0.5% @ 600 - 1050nm Wavelength Range (nm): 600 - 1050 Damage Threshold, Reference: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 7 J/cm 2 @ 1064nm, 10ns 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: 7980 0G Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×