Optical Instrument Lens

Features

Specifications

• Diameter:
  1.99212 inches
• Axial Thickness:
  0.35433 inches
• Compound Lensaxial Thickness:
  0.35433 inches
• Compound Lens Edge Thickness:
  0.12834 inches
• Equivalent Focal Length:
  3.370 inches
• Back Focal Length:
  3.409 inches
• Front Focal Length:
  3.126 inches
• Refraction Index:
  1.6968
• Abbe Constant:
  56.200
• Single Lens Style:
  Meniscus converging
• Individual Lens Style:
  Meniscus converging
• Element Left Surface Radius:
  -13.154 inches
• Element Right Surface Radius:
  -2.015 inches
• Material:
  Glass, optical, jan-g-174, grade b
• Fsc Application Data:
  1. Fire control telescope mk 102 mod 3
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-382-1740