Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 1.557 inches and 1.560 inches
• Axial Thickness:
  0.168 inches and 0.366 inches
• Compound Lensaxial Thickness:
  Between 0.524 inches and 0.544 inches
• Equivalent Focal Length:
  -11.460 inches
• Back Focal Length:
  -9.461 inches
• Refraction Index:
  1.7850 and 1.6200
• Abbe Constant:
  25.800 and 60.300
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Meniscus and meniscus converging
• Element Left Surface Radius:
  0.580 inches
• Element Right Surface Radius:
  1.073 inches
• Material:
  Glass, optical, mil-g-174, grade b
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-393-0439