Optical Instrument Lens

Features

Specifications

• Width:
  0.694 inches
• Diameter:
  1.890 inches
• Axial Thickness:
  0.740 inches and 0.158 inches
• Compound Lensaxial Thickness:
  0.898 inches
• Compound Lens Edge Thickness:
  0.557 inches
• Equivalent Focal Length:
  3.141 inches
• Back Focal Length:
  2.879 inches
• Refraction Index:
  1.5170 and 1.6210
• Abbe Constant:
  64.500 and 36.200
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  3.266 inches
• Element Right Surface Radius:
  1.010 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:
  Wight periscope, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-692-1535