Optical Instrument Lens

Features

Specifications

• Diameter:
  2.255 inches
• Axial Thickness:
  0.393 inches and 0.277 inches
• Compound Lensaxial Thickness:
  0.670 inches
• Equivalent Focal Length:
  14.130 inches
• Back Focal Length:
  13.744 inches
• Refraction Index:
  1.5170 and 1.6170
• Abbe Constant:
  64.500 and 36.600
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus
• Element Left Surface Radius:
  -6.082 millimeters and 7.390 millimeters
• Element Right Surface Radius:
  -35.390 millimeters and -6.082 millimeters
• Material:
  Glass, optical, mil-g-174, grade c, type 517-645
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-531-6908