Optical Instrument Lens

Features

Specifications

• Diameter:
  1.693 inches
• Axial Thickness:
  0.236 inches and 0.177 inches
• Compound Lensaxial Thickness:
  0.413 inches
• Compound Lens Edge Thickness:
  0.383 inches
• Equivalent Focal Length:
  28.807 inches
• Back Focal Length:
  28.547 inches
• Front Focal Length:
  28.799 inches
• Refraction Index:
  1.5170 and 1.6170
• Abbe Constant:
  64.500 and 36.600
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  -12.110 inches and 13.866 inches
• Element Right Surface Radius:
  -12.110 inches and -108.440 inches
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Fire control, range finder mk 46, mod 0
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-152-8108