5mm Diameter, 405nm V-Coat, λ/4 N-BK7 Window

Product Details <0.25% Reflection at Design Wavelength Coatings Available for HeNe, Diode, and Nd:YAG Laser Sources Precision N-BK7 Substrate Also Available Uncoated , MgF 2 Coated and VIS 0° Coated TECHSPEC λ/4 N-BK7 Laser Line Windows are ideally suited for industrial and low power laser applications. The high tolerance design yields minimal beam distortion and scatter. Anti-reflection coatings provide <0.25% reflection at the coating's design wavelengths. Specifications General Type: Laser Line Window Type of Window: Glass Physical & Mechanical Properties Clear Aperture CA (mm): 4.50 Diameter (mm): 5.00 +0.00/-0.25 Thickness (mm): 2.00 ±0.20 Parallelism (arcmin): ≤1 Bevel: Protective as needed Clear Aperture (%): 90 Edges: Fine Ground Poisson's Ratio: 0.21 Young's Modulus (GPa): 82 Knoop Hardness (kg/mm 2 ): 610.00 Knoop Hardness (GPa): 610 Optical Properties Coating: Laser V-Coat (405nm) Design Wavelength DWL (nm): 405 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BK7 Index of Refraction (n d ): 1.516 Surface Quality: 60-40 Abbe Number (v d ): 64.17 Coating Specification: R abs <0.25% @ 405nm Surface Flatness (P-V): λ/4 Material Properties Density (g/cm 3 ): 2.51 Coefficient of Thermal Expansion CTE (10 -6 /°C): 7.1 (-30 to +70°C) 8.3 (+20 to +300°C) Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×