25.4mm Dia. x 76.2mm FL, Uncoated, ISP Optics Zinc Selenide (ZnSe) Meniscus Lens | ZC-PM-25-76

Product Details Positive or Negative Meniscus Lenses CVD Grade Zinc Selenide (ZnSe) Ideal for CO 2 Systems Uncoated or BBAR Coated for 8 – 12µm ISP Optics Zinc Selenide (ZnSe) Meniscus Lenses feature positive and negative meniscus designs that minimize spherical aberration. Positive meniscus lenses enable smaller spot sizes than possible with PCX lenses, making them ideal for use in CO 2 laser applications for precise marking or cutting. Negative meniscus lenses are used to increase the focal length when used with additional lenses, decreasing the numerical aperture of an optical system. ISP Optics Zinc Selenide (ZnSe) Meniscus Lenses are available in standard imperial sizes either uncoated or Broadband Anti-Reflection (BBAR) coated for enhanced transmission from 8 – 12µm. Specifications General Type: Meniscus Lens Model Number: ZC-PM-25-76 Physical & Mechanical Properties Diameter (mm): 25.40 +0.00/-0.13 Center Thickness CT (mm): 2.80 ±0.20 Edge Thickness ET (mm): 2.00 Clear Aperture (%): 90 Clear Aperture CA (mm): 22.86 Centering (arcmin): <3 Optical Properties Effective Focal Length EFL (mm): 76.20 @ 10.6μm Focal Length Tolerance (%): ±2 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Zinc Selenide (ZnSe), CVD Grade f/#: 3.00 Numerical Aperture NA: 0.17 Coating: Uncoated Wavelength Range (nm): 600 - 18000 Radius R 1 (mm): 179.47 Radius R 2 (mm): 68.23 Surface Quality: 60-40 Irregularity (P-V) @ 10.6μm: λ/20 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×