Optical Instrument Window

Features

Specifications

• Diameter:
  Between 3.676 inches and 3.686 inches
• Thickness:
  Between 0.115 inches and 0.125 inches
• Bevel Depth:
  Between 0.010 inches and 0.020 inches
• Refraction Index:
  1.5170
• Polished Surface:
  Both
• Dispersion:
  64.5 angstroms
• Reflection Reducing Surface:
  Both
• Polished Periphery:
  Not provided
• Bevel Angle In Deg:
  45.000
• Material:
  Glass, optical, mil-g-174, grade c, type 517-645
• Fsc Application Data:
  Sight, reflex
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-912-4227