Model #278702-10

Optical instrument lens (NSN 6650-00-026-8134)

Description

grade c jan-g-174 optical glass material.

Diameter
2.440 inches
Axial Thickness
0.315 inches and 0.236 inches
Compound Lensaxial Thickness
0.551 inches
Compound Lens Edge Thickness
0.503 inches
Equivalent Focal Length
31.656 inches
Back Focal Length
31.212 inches
Front Focal Length
31.555 inches
Refraction Index
1.5170 and 1.6170
Abbe Constant
64.500 and 36.600
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
-13.255 inches and 15.066 inches
Element Right Surface Radius
-13.255 inches and -125.539 inches
Material
Glass, optical, jan-g-174, grade c
Fsc Application Data
Fire control, range finder mk 37 mod 5
Description
Lens,optical Instrument
Cage Code
10001

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Updated: 11/25/2024