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