6695-421

Optical instrument window

6695-421 Description

4.960 inches diameter, 0.250 inches thickness, polished surface finish, glass, optical, mil-g-174, grade b, type 517-645 material.

Properties of 6695-421

Diameter:
4.960 inches
Thickness:
0.250 inches
Surface Finish:
Polished
Polished Surface:
Both
Reflection Reducing Surface:
Both
Polished Periphery:
Provided
Material:
Glass, optical, mil-g-174, grade b, type 517-645
Material:
Glass, optical, mil-g-174, grade b, type 517-645
NSN:
1240-01-051-5786
Description:
Window,optical Instrument
Cage Code:
80294

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 11/08/2024