Model #7688729

Optical instrument lens (NSN 6650-00-768-8729)

Special Features
Chamfer edges 0.010 in. Min, 0.020 in. Max. By 45 deg. Front and back surfaces coated with magnesium fluoride.
Description

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

Diameter
Between 1.391 inches and 1.397 inches
Axial Thickness
Between 0.206 inches and 0.226 inches
Equivalent Focal Length
4.045 inches
Back Focal Length
3.902 inches
Refraction Index
1.5110
Abbe Constant
63.500
Single Lens Style
Plano-convex
Element Left Surface Radius
2.067 inches
Element Right Surface Radius
2.067 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