Optical Instrument Lens

Features

Specifications

• Diameter:
  1.900 inches
• Axial Thickness:
  0.100 inches
• Equivalent Focal Length:
  3.995 inches
• Back Focal Length:
  2.059 inches
• Front Focal Length:
  1.959 inches
• Refraction Index:
  1.6570
• Abbe Constant:
  2.059
• Single Lens Style:
  Plano-concave
• Individual Lens Style:
  Plano-concave
• Element Left Surface Radius:
  1.353 inches
• Element Right Surface Radius:
  1.353 inches
• Material Specification:
  Mil-g-174, class 1, grade c military specification single material response
• Fsc Application Data:
  1. Periscope, tank, xm48
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-902-9736