Biconvex lens φ5mm Focal length: 5mm Back focus: 4.14mm Material: B270 1pc

This lens corrects chromatic and spherical aberration by combining two lenses, one convex and one concave, with different refractive indices. This lens is used to suppress or correct chromatic aberration and spherical aberration. The type of anti-reflective coating varies depending on the size. Material: B270 Outer diameter (φmm): 5 Focal length (mm): 5 Back Focus (mm): 4.14 Medium thickness (mm): 2.5 Edge thickness (mm): 1.21 Design wavelength: 587.6nm Refractive index: 1.523/nd Chamfer (45°): 0.1mm <Tolerance range> Outer diameter: +0/-0.1mm Center thickness: ±0.2mm Focal length: ±2% Surface quality: MIL60-40 Eccentricity: Within 3 minutes (3')