Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 2.28189 inches and 2.28346 inches
• Axial Thickness:
  0.47244 inches
• Equivalent Focal Length:
  4.188 inches
• Back Focal Length:
  4.188 inches
• Front Focal Length:
  3.877 inches
• Refraction Index:
  1.5170
• Abbe Constant:
  64.500
• Single Lens Style:
  Plano-convex
• Compound Lens Style:
  Dialyte
• Individual Lens Style:
  Plano-convex
• 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:
  1. Fire control computing sights and devices
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-816-0505