Optical Instrument Lens

Features

Specifications

• Diameter:
  2.069 inches
• Axial Thickness:
  0.700 inches and 0.126 inches
• Compound Lensaxial Thickness:
  0.826 inches
• Compound Lens Edge Thickness:
  0.250 inches
• Equivalent Focal Length:
  3.715 inches
• Back Focal Length:
  3.095 inches
• Front Focal Length:
  2.269 inches
• Refraction Index:
  2.2690 and 1.6200
• Abbe Constant:
  60.300 and 29.300
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and double concave
• Element Left Surface Radius:
  1.851 inches
• Element Right Surface Radius:
  2.731 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade c
• Material Specification:
  Mil-g-174, class 1, grade c military specification single material response
• Fsc Application Data:
  Telescope integrated with fire control equip
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-964-9277