Optical Instrument Lens

Features

Specifications

• Diameter:
  0.315 inches
• Axial Thickness:
  0.118 inches and 0.039 inches
• Compound Lensaxial Thickness:
  0.157 inches
• Compound Lens Edge Thickness:
  0.134 inches
• Equivalent Focal Length:
  1.110 inches
• Back Focal Length:
  1.033 inches
• Front Focal Length:
  1.065 inches
• Refraction Index:
  1.5740 and 1.6200
• Abbe Constant:
  57.700 and 36.200
• 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, range finder, mk 57
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-155-1356