Optical Instrument Lens

Features

Specifications

• Diameter:
  1.311 inches
• Axial Thickness:
  0.123 inches and 0.289 inches
• Compound Lensaxial Thickness:
  0.412 inches
• Compound Lens Edge Thickness:
  0.319 inches
• Equivalent Focal Length:
  5.502 inches
• Front Focal Length:
  5.303 inches
• Refraction Index:
  1.6490 and 1.5170
• Abbe Constant:
  33.800 and 64.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Meniscus diverging and double convex
• Element Left Surface Radius:
  7.317 inches and 2.252 inches
• Element Right Surface Radius:
  -2.252 inches and -3.374 inches
• Material:
  Glass, optical, jan-g-174, grade c
• Fsc Application Data:
  Periscope, m16h, integrated with fire control equipment
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-757-7957