Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 1.424 inches and 1.427 inches
• Axial Thickness:
  0.064 inches and 0.579 inches
• Compound Lensaxial Thickness:
  Between 0.633 inches and 0.653 inches
• Compound Lens Edge Thickness:
  0.542 inches
• Equivalent Focal Length:
  8.090 inches
• Back Focal Length:
  8.944 inches
• Refraction Index:
  Between 1.6170 and 1.5170
• Abbe Constant:
  36.600 and 64.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double concave and double convex
• Element Left Surface Radius:
  3.255 inches
• Element Right Surface Radius:
  1.503 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade c, type 617-366 or glass, optical, mil-g-174, class 1, grade c, type 517-645
• Fsc Application Data:
  Telescope bc m65
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-531-6357
• Special Features:
  Reflection reducing treatment on front surface, jan-m-621