Optical Instrument Lens

Features

Specifications

• Diameter:
  2.047 inches
• Axial Thickness:
  0.461 inches and 0.118 inches
• Compound Lensaxial Thickness:
  0.579 inches
• Compound Lens Edge Thickness:
  0.392 inches
• Equivalent Focal Length:
  6.790 inches
• Back Focal Length:
  6.516 inches
• Refraction Index:
  1.5110 and 1.6490
• Abbe Constant:
  63.500 and 33.800
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  4.410 inches
• Element Right Surface Radius:
  2.897 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade c
• Material Specification:
  Mil-g-174, class 1, grade c military specification single material response
• Fsc Application Data:
  Periscope, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-757-5133