Model #LD172589GP78

Optical instrument lens (NSN 6650-00-382-1859)

Description

Glass optical material.

Diameter
1.181 inches
Axial Thickness
0.295 inches and 0.138 inches
Compound Lensaxial Thickness
0.433 inches
Compound Lens Edge Thickness
0.357 inches
Equivalent Focal Length
5.402 inches
Back Focal Length
5.215 inches
Front Focal Length
5.304 inches
Refraction Index
1.5170 and 1.6210
Abbe Constant
64.300 and 36.600
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
-1.970 inches and 3.710 inches
Element Right Surface Radius
-1.970 inches and -6.181 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, telescope, mk 77
Description
Lens,optical Instrument
Cage Code
10001

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Updated: 05/08/2024