25.4mm Dia. x 5mm Thickness, Uncoated, ZnSe Window

Product Details Low Dispersion Available Uncoated or AR Coated Ideal for Thermal Imaging, FLIR, and Medical Systems TECHSPEC Zinc Selenide (ZnSe) Windows are ideal for a wide variety of infrared applications, including thermal imaging, FLIR, and medical systems. This chemically vapor-deposited material has wide usage in CO2 laser systems because of its low absorption coefficient and high resistance to thermal shock. Zinc Selenide (ZnSe) is a relatively soft material that scratches easily, and it is not recommended in harsh environments because its Knoop Hardness is only 120. When handling TECHSPEC Zinc Selenide (ZnSe) Windows, apply uniform pressure and wear Latex finger cots or gloves to prevent contamination. These windows are available uncoated or with broadband anti-reflection coating in diameters ranging from 5 to 127mm. Note: Special care should be taken when handling Zinc Selenide as it is a toxic material. Always wear rubber or plastic gloves to avoid risk of contamination. Specifications General Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Clear Aperture CA (mm): 22.86 Diameter (mm): 25.40 +0.0/-0.1 Thickness (mm): 5.00 ±0.1 Parallelism (arcmin): <3 Dimensional Tolerance (mm): +0.0/-0.1 Bevel: Protective as needed Clear Aperture (%): 90 Edges: Fine Ground Poisson's Ratio: 0.28 Knoop Hardness (kg/mm 2 ): 120.00 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Zinc Selenide (ZnSe) Index of Refraction (n d ): 2.631 Surface Quality: 40-20 Wavelength Range (nm): 600 - 18000 Surface Flatness (P-V): λ/10 @ 10.6μm Material Properties Density (g/cm 3 ): 5.27 Coefficient of Thermal Expansion CTE (10 -6 /°C): 7.57 Regulatory Compliance RoHS 2015: Compliant × Reach 224: Compliant × Certificate of Conformance: View ×