Optical Instrument Lens

Features

Specifications

• Diameter:
  0.690 inches
• Axial Thickness:
  0.236 inches and 0.039 inches
• Compound Lensaxial Thickness:
  0.275 inches
• Compound Lens Edge Thickness:
  0.175 inches
• Equivalent Focal Length:
  1.446 inches
• Back Focal Length:
  1.281 inches
• Front Focal Length:
  1.006 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 diverging
• Element Left Surface Radius:
  0.793 inches
• Element Right Surface Radius:
  0.709 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:
  Binocular, fire control
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-757-5230