Optical Instrument Lens

Features

Specifications

• Diameter:
  2.283 inches
• Axial Thickness:
  0.886 inches and 0.157 inches
• Compound Lensaxial Thickness:
  1.043 inches
• Compound Lens Edge Thickness:
  0.729 inches
• Equivalent Focal Length:
  2.998 inches
• Back Focal Length:
  2.753 inches
• Front Focal Length:
  1.710 inches
• Refraction Index:
  1.6970 and 1.7200
• Abbe Constant:
  56.100 and 29.300
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  -3.150 inches and 4.911 inches
• Element Right Surface Radius:
  -1.418 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:
  Telescope, m69g, integrated with fire control equip
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-532-1551