25mm Dia. x 400mm FL Uncoated, DCX N-K5 Lens

Product Details N-K5 Substrate Various Anti-Reflection (AR) Coatings PCX and DCX Options Available N-K5 Lenses are available in various diameters, focal lengths, as well as Plano-Convex and Double-Convex form factors. Anti-reflective coatings covering the VIS to NIR make these ideal for multiple applications. Specifications General Type: Double-Convex Lens Physical & Mechanical Properties Diameter (mm): 25.00 +0.00/-0.10 Center Thickness CT (mm): 5.00 ±0.10 Edge Thickness ET (mm): 4.63 Centering (arcmin): <1 Clear Aperture CA (mm): 24 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 400.00 @ 587.6nm Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): 398.75 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-K5 f/#: 16.00 Coating: Uncoated Wavelength Range (nm): 330 - 2500 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Focal Length Tolerance (%): ±1 Radius R 1 =-R 2 (mm): 417.54 Numerical Aperture NA: 0.03 Regulatory Compliance Certificate of Conformance: View ×