12.5 x 25mm EFL Steinheil Triplet Achromatic Lens

Product Details Designed for 1:1 Conjugate Ratios Ideal for Relay Systems Hastings Triplet Achromatic Lenses Also Available TECHSPEC Steinheil Triplet Achromatic Lenses are designed for 1:1 conjugate ratios and utilize symmetry to correct for aberrations. Steinheils are made from a low index center element cemented between two identical high index outer elements. Each lens is edged down to f-numbers with reasonable aberration correction at increased fields. TECHSPEC Steinheil Triplet Achromatic Lenses feature small diameters that allow for mounting in smaller spaces compared to traditional Steinheil lens designs. Steinheil Triplets are ideal for use in relay systems. Specifications General Type: Achromatic Triplet Lens Physical & Mechanical Properties Diameter (mm): 12.50 +0.0/-0.025 Center Thickness CT (mm): 18.00 ±0.3 Center Thickness CT 1 (mm): 10.00 Center Thickness CT 2 (mm): 4.00 Edge Thickness ET (mm): 15.39 Centering (arcmin): <3 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 25.00 Focal Length Tolerance (%): ±1 Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): 17.82 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BASF64 / N-BK7 / N-BASF64 f/#: 2.00 Numerical Aperture NA: 0.25 Coating: MgF 2 (400-700nm) Coating Specification: R avg ≤1.75% @ 400 - 700nm Wavelength Range (nm): 400 - 700 Radius R 1 (mm): 15.65 Radius R 2 (mm): 8.22 Radius R 3 (mm): -8.22 Radius R 4 (mm): -15.65 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Regulatory Compliance RoHS 2015: Compliant × Reach 219: Compliant × Certificate of Conformance: View ×