50.8mm Dia. λ/10 ZERODUR Optical Flat

Product Details Sizes Ranging from ½” Diameter to 14″ Diameter Each λ/20 Flat 76.2mm and Larger Includes a Certificate of Calibration Available with Standard Metallic Mirror Coatings: λ/10 and λ/20 Mirrors TECHSPEC Single Surface Optical Flats are used as a reference (test plate) against which the flatness of an unknown surface may be compared. Each piece is precision polished by our master opticians and tested on a Zygo interferometer to insure the surface flatness. The secondary surfaces of our single surface flats are pitch polished to window quality for viewing the interference pattern. TECHSPEC Single Surface Optical Flats ship in a durable storage case for permanent protection. λ/20 flats that are 76.2mm or larger also include a certificate of calibration. Specifications General Type: Interferometry Window Physical & Mechanical Properties Clear Aperture CA (mm): 45.70 Diameter (inches): 2.00 +0.00/-0.04 Diameter (mm): 50.80 +0.00/-1.00 Thickness (inches): 0.50 ±0.06 Thickness (mm): 12.70 ±1.5 Parallelism (arcmin): ≤3 Bevel: Protective as needed Construction: Single Surface Edges: Fine Ground Poisson’s Ratio: 0.24 Young’s Modulus (GPa): 90.3 Knoop Hardness (kg/mm 2 ): 620.00 Knoop Hardness (GPa): 620 Optical Properties Coating: Uncoated Color: Yellow Tint Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More ZERODUR Index of Refraction (n d ): 1.542 Surface Quality: 60-40 Abbe Number (v d ): 56.2 Surface Flatness (P-V): λ/10 Material Properties Density (g/cm 3 ): 2.53 Coefficient of Thermal Expansion CTE (10 -6 /°C): 0.1 Regulatory Compliance RoHS 2015: Compliant × Reach 224: Compliant × Certificate of Conformance: View ×