Model #7688722

Optical instrument lens (NSN 6650-00-768-8722)

Special Features
Edges chamfered 0.020 to 0.030 in. By 45 deg. Both surfaces coated with magnesium fluoride. Rim and chamfers ground.
Description

type 511-635 grade c class 1 mil-g-174 optical glass material.

Diameter
Between 1.062 inches and 1.065 inches
Axial Thickness
Between 0.226 inches and 0.246 inches
Equivalent Focal Length
2.659 inches
Back Focal Length
2.571 inches
Refraction Index
1.5110
Abbe Constant
63.500
Single Lens Style
Double convex
Individual Lens Style
Double convex
Element Left Surface Radius
2.362 inches
Element Right Surface Radius
3.093 inches
Material
Glass, optical, mil-g-174, class 1, grade c, type 511-635
Fsc Application Data
Periscope, tank
Description
Lens,optical Instrument
Cage Code
19200

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Updated: 05/19/2024