Features
type 649-338 grade c class 1 mil-g-174 optical type 517-645 and glass grade c class 1 mil-g-174 optical glass material.
Includes quality control certificate of conformance.
Specifications
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Diameter:
Between 1.237 inches and 1.243 inches
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Axial Thickness:
Between 0.349 inches and 0.369 inches and 0.092 inches and 0.112 inches
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Compound Lensaxial Thickness:
Between 0.441 inches and 0.481 inches
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Equivalent Focal Length:
5.569 inches
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Back Focal Length:
5.312 inches
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Refraction Index:
1.5170 and 1.6490
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Abbe Constant:
64.500 and 33.800
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Compound Lens Style:
Doublet
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Individual Lens Style:
Double convex and meniscus diverging
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Element Left Surface Radius:
3.127 inches
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Element Right Surface Radius:
2.410 inches
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Material:
Glass, optical, mil-g-174, class 1, grade c, type 517-645 and glass, optical, mil-g-174, class 1, grade c, type 649-338
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Fsc Application Data:
Telescope panoramic m113
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Federal Supply Class (fsc):
Optical instruments, test equipment, components and accessories
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National Stock Number (nsn):
6650-00-073-8841