Model #1240005204253

Optical instrument lens (NSN 6650-00-520-4253)

Special Features
Reflection reducing treatment on front andback surfaces, jan-m-621
Description

type 621-362 grade c mil-g-174 optical type 541-599 or glass grade c mil-g-174 optical glass material.

Diameter
Between 0.686 inches and 0.689 inches
Axial Thickness
0.236 inches and 0.024 inches
Compound Lensaxial Thickness
Between 0.240 inches and 0.272 inches
Compound Lens Edge Thickness
0.166 inches
Equivalent Focal Length
1.444 inches
Back Focal Length
1.281 inches
Refraction Index
1.5411 and 1.6210
Abbe Constant
59.900 and 36.200
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
0.793 inches and -0.595 inches
Element Right Surface Radius
-0.595 inches and -4.220 inches
Material
Glass, optical, mil-g-174, grade c, type 541-599 or glass, optical, mil-g-174, grade c, type 621-362
Fsc Application Data
Binocular, m7, m16
Description
Lens,optical Instrument
Cage Code
A00AM

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Updated: 11/21/2024