25.4mm Dia. x 50mm FL, Uncoated, ISP Optics Germanium (Ge) Meniscus Lens | GE-PM-25-50

Product Details Positive Meniscus Lens Designs Minimize Spherical Aberration and Reduce Spot Sizes Wavelength Range of 2 – 16μm 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. ISP Optics Germanium (Ge) Meniscus Lenses are convex-concave lenses designed to minimize spherical aberration and reduce spot sizes. Germanium provides even transmission through the mid-wave infrared (MWIR) and long-wave infrared (LWIR) spectra, making it ideal for applications including thermal imaging, remote sensing, and infrared spectroscopy. Due to thermal runaway, or the decrease in transmission as temperature increases, germanium optics should be used at temperatures below 100°C. ISP Optics Germanium (Ge) Meniscus Lenses are available with focal lengths ranging from 13 to 150mm in standard imperial sizes for easy integration into benchtop systems. Specifications General Type: Meniscus Lens Model Number: GE-PM-25-50 Physical & Mechanical Properties Diameter (mm): 25.40 +0.00/-0.13 Center Thickness CT (mm): 3.00 ±0.20 Edge Thickness ET (mm): 2.50 Clear Aperture (%): 90 Clear Aperture CA (mm): 22.86 Centering (arcmin): <3 Optical Properties Effective Focal Length EFL (mm): 50.00 @ 10.6μm Focal Length Tolerance (%): ±2 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Germanium (Ge) f/#: 1.97 Numerical Aperture NA: 0.25 Coating: Uncoated Wavelength Range (nm): 2000 - 14000 Radius R 1 (mm): 74.47 Radius R 2 (mm): 51.45 Surface Quality: 60-40 Irregularity (P-V) @ 10.6μm: λ/20 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×