25mm Dia x -150mm FL Negative Doublet Lens MgF 2 Coated

Product Details Magnesium Fluoride (MgF 2 ) Coating Used to Extend Focal Length Broadband AR Coated Negative Achromatic Lenses Also Available TECHSPEC MgF 2 Coated Negative Achromatic Lenses consist of two optical elements cemented together. Negative doublet lenses are corrected for color and on-axis aberrations. TECHSPEC MgF 2 Coated Negative Achromatic Lenses are used predominantly as Barlow lenses to extend focal lengths. These lenses are often combined with positive achromatic mirror systems and imaging lenses. Specifications General Type: Negative Achromatic Lens Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.025 Center Thickness CT (mm): 6.56 ±0.20 Center Thickness CT 1 (mm): 2.50 ±0.10 Center Thickness CT 2 (mm): 4.06 ±0.10 Edge Thickness ET (mm): 7.73 Clear Aperture CA (mm): 24.00 Centering (arcmin): <1 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): -150.00 Focal Length Tolerance (%): ±1 Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): -152.63 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BK7 / N-SF5 f/#: 6.00 Numerical Aperture NA: 0.08 Coating: MgF 2 (400-700nm) Coating Specification: R avg ≤1.75% @ 400 - 700nm Wavelength Range (nm): 400 - 700 Radius R 1 (mm): -92.30 Radius R 2 (mm): 68.87 Radius R 3 (mm): 204.15 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 ×