Optical Instrument Lens

Features

Specifications

• Diameter:
  1.300 inches
• Axial Thickness:
  0.179 inches and 0.130 inches
• Compound Lensaxial Thickness:
  0.309 inches
• Compound Lens Edge Thickness:
  0.269 inches
• Equivalent Focal Length:
  10.600 inches
• Back Focal Length:
  10.455 inches
• Refraction Index:
  1.5725 and 1.6490
• Abbe Constant:
  57.400 and 33.800
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  7.289 inches
• Element Right Surface Radius:
  4.111 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Finder, range, t46e1 integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-507-9254