Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 0.997 inches and 1.000 inches
• Axial Thickness:
  0.364 inches and 0.121 inches
• Compound Lensaxial Thickness:
  Between 0.465 inches and 0.505 inches
• Equivalent Focal Length:
  2.534 inches
• Back Focal Length:
  2.192 inches
• Refraction Index:
  1.5730 and 1.6890
• Abbe Constant:
  57.400 and 30.900
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Element Left Surface Radius:
  -1.589 inches and 1.244 inches
• Material:
  Glass, optical, mil-g-174, grade c, type 689-309 or glass, optical, mil-g-174, grade c, type 573-574
• Fsc Application Data:
  Telescope, panoramic
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-864-2942
• Special Features:
  Plano edge chamfered 0.020 inch at 45 degrees