Model #LD172591GP29

Optical instrument lens (NSN 6650-00-382-1917)

Description

Glass optical material.

Diameter
0.945 inches
Axial Thickness
0.091 inches and 0.256 inches
Compound Lensaxial Thickness
0.347 inches
Compound Lens Edge Thickness
0.235 inches
Equivalent Focal Length
2.362 inches
Back Focal Length
2.252 inches
Front Focal Length
2.244 inches
Refraction Index
1.5170 and 1.6490
Abbe Constant
64.500 and 33.800
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
-0.945 inches and 2.126 inches
Element Right Surface Radius
-0.945 inches and -1.969 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, rangefinder, mk57
Description
Lens,optical Instrument
Cage Code
53711

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Updated: 05/27/2024