Optical Instrument Lens

Features

Specifications

• Diameter:
  1.732 inches
• Axial Thickness:
  0.157 inches and 0.315 inches
• Compound Lensaxial Thickness:
  0.472 inches
• Compound Lens Edge Thickness:
  0.419 inches
• Equivalent Focal Length:
  13.731 inches
• Back Focal Length:
  13.474 inches
• Front Focal Length:
  13.691 inches
• Refraction Index:
  1.6208 and 1.5744
• Abbe Constant:
  36.200 and 57.700
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Fire control, perescope mk 23
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-382-1951