Optical Instrument Lens

Features

Specifications

• Diameter:
  2.218 inches
• Axial Thickness:
  0.080 inches and 0.649 inches
• Compound Lensaxial Thickness:
  0.729 inches
• Compound Lens Edge Thickness:
  0.502 inches
• Equivalent Focal Length:
  7.871 inches
• Back Focal Length:
  8.333 inches
• Refraction Index:
  1.6170 and 1.5170
• Abbe Constant:
  36.600 and 64.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double concave and double convex
• Element Left Surface Radius:
  -7.616 inches and 2.148 inches
• Element Right Surface Radius:
  -2.148 inches and 2.148 inches
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Telescope, integrated with fire control
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-757-7960