Optical Instrument Lens

Features

Specifications

• Diameter:
  1.220 inches
• Axial Thickness:
  0.252 inches and 0.108 inches
• Compound Lensaxial Thickness:
  0.360 inches
• Compound Lens Edge Thickness:
  0.267 inches
• Equivalent Focal Length:
  4.790 inches or 4.800 inches
• Back Focal Length:
  4.532 inches or 4.728 inches
• Refraction Index:
  Between 1.5170 and 1.6490
• Abbe Constant:
  33.700 and 64.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Telescope, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-503-3906