Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 1.219 inches and 1.220 inches
• Axial Thickness:
  0.394 inches and 0.157 inches
• Compound Lensaxial Thickness:
  0.551 inches
• Compound Lens Edge Thickness:
  0.436 inches
• Equivalent Focal Length:
  2.765 inches
• Back Focal Length:
  2.841 inches
• Front Focal Length:
  2.359 inches
• Refraction Index:
  1.6110 and 1.6208
• Abbe Constant:
  58.800 and 36.200
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and double concave
• 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:
  Range finder, fire control
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-618-9397