20mm Diameter VIS-NIR Coated, Ultra Thin Fused Silica Window

Product Details Ultra-Thin 0.20mm Thickness UV Fused Silica Substrates Extremely Lightweight TECHSPEC Ultra-Thin Fused Silica Windows provide the benefits of fused silica including low thermal expansion, excellent chemical resistance, and UV transmission with a thickness less than 1/5th of our standard fused silica windows. Unlike traditional cover glass, these windows have polished surfaces to provide consistent transmitted wavefront distortion, making them advantageous for OEM applications. Their extremely thin designs make them ideal for both weight and size sensitive applications, especially those requiring broadband transmission from the UV to the NIR. TECHSPEC Ultra-Thin Fused Silica Windows are ideal for handheld medical devices, wearable technology, and portable UV lights. Specifications General Type: Protective Window Type of Window: Glass Physical & Mechanical Properties Clear Aperture CA (mm): 17.00 Diameter (mm): 20.00 +0.00/-0.10 Thickness (mm): 0.20 ±0.025 Bevel: Protective as needed Edges: Fine Ground Parallelism (arcsec): <1 Poisson's Ratio: 0.16 Young's Modulus (GPa): 73 Knoop Hardness (kg/mm 2 ): 522.00 Optical Properties Coating: VIS-NIR (400-1000nm) 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: 60-40 Transmitted Wavefront, P-V: λ/2 Abbe Number (v d ): 64.17 Coating Specification: R abs ≤0.25% @ 880nm R avg ≤1.25% @ 400 - 870nm R avg ≤1.25% @ 890 - 1000nm Wavelength Range (nm): 400 - 1000 Damage Threshold, Reference: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 5 J/cm2 @ 532nm, 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) Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×