Optical Instrument Lens

Features

Specifications

• Diameter:
  1.340 inches
• Axial Thickness:
  0.425 inches and 0.140 inches
• Compound Lensaxial Thickness:
  0.565 inches
• Compound Lens Edge Thickness:
  0.404 inches
• Equivalent Focal Length:
  2.952 inches
• Back Focal Length:
  2.560 inches
• Refraction Index:
  1.6890
• Abbe Constant:
  57.400 and 30.900
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Plano-concave
• Element Left Surface Radius:
  -2.148 inches and 1.478 inches
• Element Right Surface Radius:
  -2.148 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 equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-300-6596