Optical Instrument Lens

Features

Specifications

• Diameter:
  0.708 inches
• Axial Thickness:
  0.078 inches and 0.031 inches
• Compound Lensaxial Thickness:
  0.110 inches
• Compound Lens Edge Thickness:
  0.167 inches
• Equivalent Focal Length:
  2.224 inches
• Back Focal Length:
  2.338 inches
• Front Focal Length:
  2.241 inches
• Refraction Index:
  1.6460 and 1.5720
• Abbe Constant:
  34.000 and 57.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Plano-convex and double concave
• Element Left Surface Radius:
  -1.216 inches
• Element Right Surface Radius:
  -1.216 inches and 1.219 inches
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Fire control, range finder mk 45
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-382-0650