Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 2.123 inches and 2.125 inches
• Axial Thickness:
  Between 0.464 inches and 0.472 inches and 0.278 inches and 0.286 inches
• Compound Lensaxial Thickness:
  Between 0.742 inches and 0.758 inches
• Equivalent Focal Length:
  8.126 inches
• Back Focal Length:
  7.772 inches
• Front Focal Length:
  7.992 inches
• Refraction Index:
  1.5310 and 1.6030
• Abbe Constant:
  62.100 and 38.000
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  -3.167 inches and 5.391 inches
• Element Right Surface Radius:
  -3.167 inches and 12.399 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade b, type 531-621 and type 603-380
• Fsc Application Data:
  Receiver-transmitter, laser
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-213-7002
• Special Features:
  Black arrow on periphery. Front and back surfaces coated with magnesium fluoride. Chamfer edges 0.010 in. To 0.015 in. By 40 to 50 deg. Rim and chamfers ground.