Optical Instrument Lens

Features

Specifications

• Diameter:
  1.772 inches
• Axial Thickness:
  0.669 inches and 0.158 inches
• Compound Lensaxial Thickness:
  0.827 inches
• Compound Lens Edge Thickness:
  0.534 inches
• Equivalent Focal Length:
  2.905 inches
• Back Focal Length:
  2.967 inches
• Front Focal Length:
  2.333 inches
• Refraction Index:
  1.5740 and 1.6490
• Abbe Constant:
  57.700 and 33.400
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  -1.488 inches and 1.488 inches
• Element Right Surface Radius:
  -1.488 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade c
• Material Specification:
  Mil-g-174, class 1, grade c military specification single material response
• Fsc Application Data:
  Fire control, telescope mk 63
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-382-1827