Optical Instrument Lens

Features

Specifications

• Diameter:
  1.650 inches
• Axial Thickness:
  0.100 inches and 0.610 inches
• Compound Lensaxial Thickness:
  0.710 inches
• Compound Lens Edge Thickness:
  0.531 inches
• Equivalent Focal Length:
  6.532 inches
• Back Focal Length:
  7.274 inches
• Refraction Index:
  1.6490 and 1.6200
• Abbe Constant:
  33.800 and 60.300
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double concave and double convex
• Element Left Surface Radius:
  2.656 inches
• Element Right Surface Radius:
  1.663 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):
  6650-00-626-1891