Model #8567555

Optical instrument lens (NSN 6650-00-346-8211)

Description

Glass optical material.

Diameter
1.220 inches
Axial Thickness
0.3662 inches and 0.0866 inches
Compound Lensaxial Thickness
Between 0.429 inches and 0.469 inches
Compound Lens Edge Thickness
0.281 inches
Equivalent Focal Length
2.603 inches
Back Focal Length
2.491 inches
Refraction Index
1.5170 and 1.6490
Abbe Constant
64.500 and 33.800
Compound Lens Style
Doublet
Individual Lens Style
Double convex and meniscus diverging
Element Left Surface Radius
1.9405 inches and -1.1957 inches
Element Right Surface Radius
-1.1957 inches and -2.7240 inches
Material
Glass, optical, mil-g-174, class 1, grade c
Material Specification
Mil-g-174, class 1, grade c military specification single material response
Fsc Application Data
Sight periscope m25, integrated with fire control equipment
Description
Lens,optical Instrument
Cage Code
19200

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Updated: 11/21/2024