Optical Instrument Lens

Features

Specifications

• Diameter:
  1.634 inches
• Axial Thickness:
  0.185 inches and 0.642 inches
• Compound Lensaxial Thickness:
  0.827 inches
• Compound Lens Edge Thickness:
  0.752 inches
• Equivalent Focal Length:
  11.046 inches
• Back Focal Length:
  13.196 inches
• Refraction Index:
  1.6210 and 1.5411
• Abbe Constant:
  36.200 and 59.900
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double concave and double convex
• Element Left Surface Radius:
  1.839 inches
• Element Right Surface Radius:
  2.231 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):
  6650-00-757-5136