12.7mm Dia., 1mm Thick, Uncoated, ISP Optics Silicon (Si) Window | SI-W-12-1

Product Details Transmission from 1.2 – 7μm Available Uncoated or HDAR Coated for 3 – 5μm Ideal for Weight Sensitive Applications ISP Optics Silicon (Si) Windows provide transmission in the Near-Infrared (NIR) and Mid-Wave Infrared (MWIR) from 1.2 – 7μm. Silicon features a Knoop Hardness of 1150, making it harder and less brittle than Germanium. A High-Durability Anti-Reflection (HDAR) coating option increases the durability of the substrate while significantly improving transmission from 3 – 5μm, enabling use in harsh environments. ISP Optics Silicon (Si) Windows are ideal for weight-sensitive IR applications due to its low density of 2.329 g/cm 3 , which is half as dense as Germanium and Zinc Selenide. These windows are ideal for NIR imaging applications and are important for detection of sources radiating at a black body temperature of 700K. Specifications General Model Number: SI-W-12-1 Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Clear Aperture CA (mm): 10.79 Diameter (mm): 12.70 +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: 0.27 Young's Modulus (GPa): 140 Knoop Hardness (kg/mm 2 ): 1,150.00 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Silicon (Si) Index of Refraction (n d ): 3.422 @ 5µm Surface Quality: 40-20 Wavelength Range (nm): 1200 - 7000 Surface Flatness (P-V): 2λ Material Properties Density (g/cm 3 ): 2.33 Coefficient of Thermal Expansion CTE (10 -6 /°C): 2.55 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×