25mm Dia. x 50mm FL, Uncoated, Ge Plano-Convex Lens

Product Details Available Uncoated or Coated for 3 – 5, 3 – 12, and 8 – 12µm Minimal Chromatic Aberration Due to Low Dispersion Ideal for Defense, Security, and Thermal Imaging Applications Additional Infrared Lenses Available in Popular Substrates Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team . Edmund Optics has limited remaining inventory of this part number and no raw material available to supply more once this is depleted. Please contact our Product Support Engineers to help with an alternate solution for your needs. Customer Service can provide you the latest price and availability. TECHSPEC Germanium (Ge) Plano-Convex (PCX) Lenses feature precision diamond turned substrates that are available uncoated or with a variety of broadband anti-reflection (AR) coatings from 3 – 12µm. Germanium is chemically inert and insoluble in water with a Knoop Hardness of 780, making it ideal for defense, security, and thermal imaging applications requiring rugged optics. However, germanium is subject to thermal runaway and should be used at temperatures below 100°C to ensure optimal transmission. TECHSPEC Germanium (Ge) Plano-Convex (PCX) Lenses are available in 12.5, 25 and 50mm diameters. Germanium’s high index of refraction (4.003) yields significant Fresnel reflection loss without anti-reflection coatings. TECHSPEC Germanium (Ge) Plano-Convex lenses are available uncoated or with multiple Broadband Anti-Reflection (BBAR) coatings for enhanced transmission in the Mid-Wave Infrared (MWIR) and Long-Wave Infrared (LWIR). For more information on Germanium properties, please review our guide to selecting The Correct Material for Infrared (IR) Applications . Specifications General Type: Plano-Convex Lens Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.1 Center Thickness CT (mm): 3.00 ±0.10 Edge Thickness ET (mm): 2.48 Centering (arcmin): <3 Clear Aperture CA (mm): 24 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 50.00 @ 10.6µm Back Focal Length BFL (mm): 49.25 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Germanium (Ge) f/#: 2.00 Coating: Uncoated Wavelength Range (nm): 2000 - 14000 Surface Quality: 60-40 Radius R 1 (mm): 150.19 Numerical Aperture NA: 0.25 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×