Model #LD172591GP28

Optical instrument lens (NSN 6650-00-382-1916)

Description

Glass optical material.

Diameter
0.866 inches
Axial Thickness
0.256 inches and 0.091 inches
Compound Lensaxial Thickness
0.347 inches
Compound Lens Edge Thickness
0.263 inches
Equivalent Focal Length
2.402 inches
Back Focal Length
2.091 inches
Front Focal Length
2.524 inches
Refraction Index
1.5730 and 1.6490
Abbe Constant
57.400 and 33.800
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
-1.161 inches and 0.291 inches
Element Right Surface Radius
-1.161 inches and -3.824 inches
Material
Glass, optical, mil-g-174, class 1, grade c
Material Specification
Mil-g-174, class 1, grade c military specification single material response
Fsc Application Data
Fire control, rangfinder, mk 57
Description
Lens,optical Instrument
Cage Code
53711

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Updated: 05/19/2024