Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 0.965 inches and 0.968 inches
• Axial Thickness:
  0.380 inches and 0.090 inches
• Compound Lensaxial Thickness:
  Between 0.450 inches and 0.490 inches
• Compound Lens Edge Thickness:
  0.341 inches
• Equivalent Focal Length:
  2.686 inches
• Back Focal Length:
  2.231 inches
• Refraction Index:
  1.7200 and 1.5170
• Abbe Constant:
  29.300 and 64.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and double concave
• Element Left Surface Radius:
  -1.202 inches and 0.885 inches
• Element Right Surface Radius:
  -1.202 inches and 8.841 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:
  Rangefinder m17c
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-621-2930