Optical Instrument Lens

Features

Specifications

• Diameter:
  1.310 inches
• Axial Thickness:
  0.140 inches and 0.425 inches
• Compound Lensaxial Thickness:
  0.565 inches
• Compound Lens Edge Thickness:
  0.253 inches
• Equivalent Focal Length:
  2.669 inches
• Back Focal Length:
  2.308 inches
• Refraction Index:
  1.6890 and 1.5725
• Abbe Constant:
  30.900 and 57.400
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  -1.353 inches and 1.960 inches
• Element Right Surface Radius:
  -1.353 inches and 1.960 inches
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Telescope
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-698-5868