Optical Instrument Reticle

Features

Specifications

• Diameter:
  1.8900 inches
• Angle In Deg:
  45.0
• Scale Calibration:
  8-12-16-20 mils
• Axial Thickness:
  0.197 inches
• Refraction Index:
  1.5838 and 1.5230
• Dispersion:
  46.0 angstroms and 58.6 angstroms
• Rim Finish:
  Ground
• Graduations/markings:
  Stadia-scale
• Bevel Depth And Location:
  0.0200 inches opposite etched surface
• Style Designator:
  Vertically graduated
• Supplementary Features:
  Material optical glass per jan-g-174, grade d, tye 523-586 and type 584-460
• Fsc Application Data:
  Periscope, integrated with fire control
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-818-2741