Spherical lens element #87-995

germaniuminfraredfocusing

TECHSPEC® Germanium Infrared (IR) Aspheric Lenses provide diffraction-limited focusing performance over a broad spectral range in the Mid and Long Wave infrared regions. Ideal for monochromatic light sources, such as quantum cascade lasers, these lenses offer a high-performance alternative to standard plano-convex lenses. Diffraction Limited Performance Variety of Coating Options Full Prescription Data Available 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. Common Specifications Centering (arcmin): ≤5 Bevel: Protective as needed Edges: Diamond Turned Asphere Figure Error, RMS @ 632.8nm: λ/6 Surface Quality: 60-40 Index of Refraction (nd): 4.002 @ 11µm Conjugate Distance: Infinite Coefficient of Thermal Expansion CTE (10-6/°C): 6.1 Special Handling Germanium Optics Handling and Cleaning Guidelines Germanium optics require special handling and cleaning procedures. Always wear gloves during handling to prevent contamination, and wash hands afterward. Avoid contact between Germanium dust and the eyes, skin, or clothing. When not in use, store optics sealed and covered at temperatures between 20°C and 25°C. Do not expose them to temperatures exceeding 100°C when in use.