Optical Instrument Lens

Features

Specifications

• Diameter:
  1.500 inches
• Axial Thickness:
  0.204 inches and 0.143 inches
• Compound Lensaxial Thickness:
  0.347 inches
• Compound Lens Edge Thickness:
  0.289 inches
• Equivalent Focal Length:
  11.682 inches
• Back Focal Length:
  11.660 inches
• Refraction Index:
  1.5230 and 1.6210
• Abbe Constant:
  58.600 and 36.200
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  -2.649 inches and 22.769 inches
• Element Right Surface Radius:
  -2.649 inches and 6.235 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Finder, range, t42e1, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-507-9255