Model #178697PC8

Optical instrument lens (NSN 6650-00-155-1757)

Description

grade c jan-g-174 optical glass material.

Diameter
0.630 inches
Axial Thickness
0.216 inches and 0.082 inches
Compound Lensaxial Thickness
0.299 inches
Compound Lens Edge Thickness
0.279 inches
Equivalent Focal Length
3.586 inches
Back Focal Length
3.444 inches
Front Focal Length
3.539 inches
Refraction Index
1.5720 and 1.6170
Abbe Constant
57.400 and 36.600
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
-1.031 inches and 2.574 inches
Element Right Surface Radius
-1.031 inches and -6.023 inches
Material
Glass, optical, jan-g-174, grade c
Fsc Application Data
Fire control, range finder mk 15 mod 4
Description
Lens,optical Instrument
Cage Code
10001

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Updated: 11/21/2024