25.4mm Dia. x 500mm FL, 3-5µm BBAR Coated, ISP Optics Silicon (Si) PCX Lens | HDAR35-SI-PX-25-500

Product Details High-Durability Anti-Reflection (HDAR) Coated for 3 – 5μm Ideal for Weight Sensitive Applications Available Focal Lengths from 25.4 – 500mm ISP Optics Silicon (Si) Plano-Convex (PCX) Lenses feature a High Durability Anti-Reflection (HDAR) coating for increased transmission in the 3 – 5μm range. Silicon features a Knoop Hardness of 1150 making it harder and less brittle than Germanium. In addition, the HDAR coating increases the durability of the substrate, enabling use in harsh environments. ISP Optics Silicon (Si) Plano-Convex (PCX) Lenses also feature a low density of 2.329g/cm 3 , making them ideal for weight-sensitive IR applications such as Near-Infrared (NIR) imaging and infrared spectroscopy. Specifications General Type: Plano-Convex Lens Model Number: HDAR35-SI-PX-25-500 Physical & Mechanical Properties Diameter (mm): 25.40 +0.00/-0.13 Center Thickness CT (mm): 2.00 ±0.20 Edge Thickness ET (mm): 2.00 Centering (arcmin): <3 Clear Aperture CA (mm): 22.86 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 500.00 @ 4µm Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Silicon (Si) f/#: 19.69 Coating: BBAR (3000-5000nm) Coating Specification: R avg <0.5% @ 3 - 5µm R abs <1.5% @ 3 - 5µm Wavelength Range (nm): 3000 - 5000 Surface Quality: 80-50 Irregularity (P-V) @ 632.8nm: 1λ Focal Length Tolerance (%): ±2 Radius R 1 (mm): 1,213.90 Numerical Aperture NA: 0.03 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×