8298401

Optical instrument window

8298401 Description

1.312 inches width, 0.302 inches thickness, 4.307 inches length, feat criticality code justification, light deviation not to exceed 3 min of arc plus astigmatism not to exceed 20 millidiopters .

Features

Light deviation not to exceed 3 min of arc plus astigmatism not to exceed 20 millidiopters

Properties of 8298401

Width:
1.312 inches
Thickness:
Between 0.302 inches and 0.332 inches
Length:
4.307 inches
Bevel Depth:
0.125 inches
Polished Surface:
Both
Reflection Reducing Surface:
Both
Polished Periphery:
Not provided
Bevel Angle In Deg:
30.000
Criticality Code Justification:
Feat
Material:
Glass, optical, mil-g-174, grade c, type 517-645
Material:
Glass, optical, mil-g-174, grade c, type 517-645
Fsc Application Data:
Fire control periscope
NSN:
1240-00-580-0635
Description:
Window,optical Instrument
Cage Code:
19200

Definition Optical Instrument Window

A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.

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Last modified 04/30/2024