Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 2.282 inches and 2.283 inches
• Axial Thickness:
  0.394 inches and 0.217 inches
• Compound Lensaxial Thickness:
  0.610 inches
• Compound Lens Edge Thickness:
  0.599 inches
• Equivalent Focal Length:
  11.973 inches
• Back Focal Length:
  11.592 inches
• Front Focal Length:
  11.970 inches
• Refraction Index:
  1.5225 and 1.6170
• Abbe Constant:
  57.400 and 36.600
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  -4.016 inches and 6.604 inches
• Element Right Surface Radius:
  -4.016 inches and 77.835 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Optical sighting ranging equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-210-4386