Optical Instrument Lens

Features

Specifications

• Diameter:
  0.689 inches
• Axial Thickness:
  0.354 inches and 0.055 inches
• Compound Lensaxial Thickness:
  0.409 inches
• Compound Lens Edge Thickness:
  0.291 inches
• Equivalent Focal Length:
  1.160 inches
• Back Focal Length:
  0.901 inches
• Refraction Index:
  1.5410 and 1.6170
• Abbe Constant:
  59.900 and 36.600
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  0.638 inches
• Element Right Surface Radius:
  0.480 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade d
• Fsc Application Data:
  Binocular, fire control
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-518-5191