Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 1.750 inches and 1.752 inches
• Axial Thickness:
  0.370 inches and 0.150 inches
• Compound Lensaxial Thickness:
  0.520 inches
• Compound Lens Edge Thickness:
  0.296 inches
• Equivalent Focal Length:
  3.133 inches
• Back Focal Length:
  3.176 inches
• Front Focal Length:
  2.773 inches
• Refraction Index:
  1.6110 and 1.6490
• Abbe Constant:
  58.800 and 33.800
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and double concave
• Element Left Surface Radius:
  -6.169 inches and 1.700 inches
• Element Right Surface Radius:
  -6.169 inches and 16.598 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Optical sighting and ranging equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-210-4399