Optical Instrument Lens

Features

Specifications

• Diameter:
  1.732 inches
• Axial Thickness:
  0.551 inches and 0.121 inches
• Compound Lensaxial Thickness:
  0.672 inches
• Compound Lens Edge Thickness:
  0.349 inches
• Equivalent Focal Length:
  2.725 inches
• Back Focal Length:
  2.578 inches
• Front Focal Length:
  2.416 inches
• Refraction Index:
  1.5169 and 1.6488
• Abbe Constant:
  64.400 and 33.800
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Periscope mk 30-mod 2
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-382-1960