Optical Instrument Lens

Features

Specifications

• Diameter:
  2.370 inches
• Axial Thickness:
  0.122 inches and 0.750 inches
• Compound Lensaxial Thickness:
  0.872 inches
• Compound Lens Edge Thickness:
  0.687 inches
• Equivalent Focal Length:
  10.812 inches
• Back Focal Length:
  10.198 inches
• Front Focal Length:
  9.326 inches
• Refraction Index:
  1.7200 and 1.6200
• Abbe Constant:
  29.300 and 60.300
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double concave and double convex
• Element Left Surface Radius:
  -4.701 inches and 2.370 inches
• Element Right Surface Radius:
  -2.370 inches and 2.370 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:
  Periscope, xm44
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-903-6670