Optical Instrument Lens

Features

Specifications

• Diameter:
  1.700 inches
• Axial Thickness:
  0.160 inches and 0.230 inches
• Compound Lensaxial Thickness:
  0.390 inches
• Compound Lens Edge Thickness:
  0.344 inches
• Equivalent Focal Length:
  13.807 inches
• Back Focal Length:
  14.180 inches
• Front Focal Length:
  13.790 inches
• Refraction Index:
  1.6170 and 1.5230
• Abbe Constant:
  36.600 and 58.600
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Meniscus diverging and double convex
• Element Left Surface Radius:
  7.237 inches and 3.188 inches
• Element Right Surface Radius:
  3.188 inches and -31.336 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Range finder, integrated with fire control equip
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-763-2697