Optical Instrument Lens

Features

Specifications

• Diameter:
  1.280 inches
• Axial Thickness:
  0.165 inches and 0.125 inches
• Compound Lensaxial Thickness:
  0.290 inches
• Compound Lens Edge Thickness:
  0.264 inches
• Equivalent Focal Length:
  17.295 inches
• Back Focal Length:
  17.091 inches
• Front Focal Length:
  16.801 inches
• Refraction Index:
  1.5286 and 1.6170
• Abbe Constant:
  51.600 and 38.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  -8.821 inches and 7.800 inches
• Element Right Surface Radius:
  -8.821 inches and 0.000 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Telescope, t150e1, integrated with fire control equip
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-300-6594