Optical Instrument Lens

Features

Specifications

• Diameter:
  1.718 inches
• Axial Thickness:
  0.671 inches and 0.158 inches
• Compound Lensaxial Thickness:
  0.829 inches
• Compound Lens Edge Thickness:
  0.375 inches
• Equivalent Focal Length:
  10.107 inches
• Back Focal Length:
  10.076 inches
• Refraction Index:
  1.5125 and 1.5725
• Abbe Constant:
  60.500 and 42.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Plano-convex and meniscus diverging
• Element Left Surface Radius:
  41.680 millimeters
• Element Right Surface Radius:
  1.635 inches
• Material:
  Glass, optical, jan-g-174, grade b
• Fsc Application Data:
  Telescope, m69g, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-759-3585