Optical Instrument Lens

Features

Specifications

• Diameter:
  1.874 inches
• Axial Thickness:
  0.259 inches and 0.188 inches
• Compound Lensaxial Thickness:
  0.447 inches
• Compound Lens Edge Thickness:
  0.350 inches
• Equivalent Focal Length:
  10.725 inches
• Back Focal Length:
  10.525 inches
• Refraction Index:
  1.5170 and 1.6490
• Abbe Constant:
  64.500 and 33.800
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  -4.630 inches and 6.601 inches
• Element Right Surface Radius:
  -4.630 inches and 14.788 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b
• Fsc Application Data:
  Telescope, bc, m65, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-531-6356