Optical Instrument Lens

Features

Specifications

• Diameter:
  1.140 inches
• Length:
  0.423 inches
• Axial Thickness:
  0.153 inches and 0.075 inches and 0.195 inches
• Compound Lensaxial Thickness:
  0.423 inches
• Compound Lens Edge Thickness:
  0.277 inches
• Equivalent Focal Length:
  1.393 inches
• Back Focal Length:
  1.336 inches
• Front Focal Length:
  1.242 inches
• Refraction Index:
  1.7883 and 1.8466
• Abbe Constant:
  47.390 and 23.830 and 23.830
• Compound Lens Style:
  Triplet
• Individual Lens Style:
  Double convex and plano-convex and double convex
• Individual Lens Style:
  Double convex and plano-convex
• Element Left Surface Radius:
  3.8233 inches and -1.8704 inches and 2.2593 inches
• Element Right Surface Radius:
  -1.8704 inches and 2.2592 inches and -1.6234 inches
• Material:
  Glass, optical, mil-g-174, type laf-21, 788-474 and glass, optical, mil-g-174, type sf-57, 847-238
• Fsc Application Data:
  Night vision equipment, emitted and reflected radiation
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-167-7888