12.7mm Dia. x 6.35mm FL, Uncoated, ZnSe Aspheric Lens

Product Details Edmund Optics Designed, Coherent Manufactured Premier Grade ZnSe Material Uncoated or Broadband 8-12µm AR Coating Available TECHSPEC Zinc Selenide (ZnSe) Aspheric Lenses are designed to provide diffraction-limited focusing performance for 10.6µm CO 2 lasers. Manufactured from Coherent Infrared ZnSe material featuring <0.0005 cm -1 bulk absorption at 10.6µm, these lenses are available uncoated or with a broadband anti-reflection coating providing superior transmission from 8 - 12µm. The precision designs are ideal for integration into laser systems, thermal imaging assemblies, and FTIR devices. TECHSPEC Zinc Selenide Aspheric Lenses feature an irregularity of <λ/20 at 10.6µm, 40-20 surface quality, and <50Å surface roughness. Notes: II-VI Incorporated is now Coherent Corp. Special care should be taken when handling Zinc Selenide as it is a toxic material. Always wear rubber or plastic gloves to avoid risk of contamination. Specifications General Type: Aspheric Lens Physical & Mechanical Properties Diameter (mm): 12.70 +0.00/-0.10 Center Thickness CT (mm): 4.00 ±0.10 Edge Thickness ET (mm): 1.89 Clear Aperture CA (mm): 11.43 Centering (arcmin): ≤20 Centering, ETD (μm): ≤50.8 Shape of Back Surface: Plano Bevel: Protective as needed Surface Roughness (Å): <50 RMS Optical Properties Effective Focal Length EFL (mm): 6.35 Back Focal Length BFL (mm): 4.69 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Coherent Infrared ZnSe f/#: 0.5 Numerical Aperture NA: 1.00 Index of Refraction (n d ): 2.631 Coating: Uncoated Wavelength Range (nm): 600 - 18000 Surface Quality: 40-20 Asphere Figure Error, RMS @ 632.8nm: λ/2 Power (P-V) @ 632.8nm: λ/10 Conjugate Distance: Infinite Electrical Power (P-V) @ 10.6μm: λ/10 Material Properties Coefficient of Thermal Expansion CTE (10 -6 /°C): 7.57 Regulatory Compliance RoHS 2015: Compliant × Reach 224: Compliant × Certificate of Conformance: View ×