Optical Instrument Lens

Features

Specifications

• Diameter:
  1.299 inches
• Axial Thickness:
  0.335 inches and 0.118 inches
• Compound Lens Edge Thickness:
  0.327 inches
• Equivalent Focal Length:
  4.428 inches
• Back Focal Length:
  4.501 inches
• Front Focal Length:
  4.067 inches
• Refraction Index:
  1.5170 and 1.6490
• Abbe Constant:
  64.500 and 33.800
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and plano-concave
• Material:
  Glass, optical, mil-g-174, class 1, grade c
• Material Specification:
  Mil-g-174, class 1, grade c military specification single material response
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-152-6537