Model #1122663

Optical instrument lens (NSN 6650-00-167-7888)

Description

847-238 type sf-57 mil-g-174 optical 788-474 and glass type laf-21 mil-g-174 optical glass material.

Diameter
1.140 inches
Length
0.423 inches
Axial Thickness
0.153 inches and 0.075 inches and 0.195 inches
Compound Lensaxial Thickness
0.423 inches
Compound Lens Edge Thickness
0.277 inches
Equivalent Focal Length
1.393 inches
Back Focal Length
1.336 inches
Front Focal Length
1.242 inches
Refraction Index
1.7883 and 1.8466
Abbe Constant
47.390 and 23.830 and 23.830
Compound Lens Style
Triplet
Individual Lens Style
Double convex and plano-convex and double convex
Individual Lens Style
Double convex and plano-convex
Element Left Surface Radius
3.8233 inches and -1.8704 inches and 2.2593 inches
Element Right Surface Radius
-1.8704 inches and 2.2592 inches and -1.6234 inches
Material
Glass, optical, mil-g-174, type laf-21, 788-474 and glass, optical, mil-g-174, type sf-57, 847-238
Fsc Application Data
Night vision equipment, emitted and reflected radiation
Description
Lens,optical Instrument
Cage Code
94117

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Updated: 11/21/2024