1240006204979

Optical instrument window

1240006204979 Description

2.022 inches diameter, 0.418 inches thickness, glass, optical, mil-g-174, grade b, type 517-645 material, glass, optical, mil-g-174, grade b, type 517-645 iii material.

Properties of 1240006204979

Diameter:
Between 2.022 inches and 2.025 inches
Thickness:
Between 0.418 inches and 0.458 inches
Bevel Depth:
Between 0.020 inches and 0.030 inches
Refraction Index:
1.5170
Polished Surface:
Both
Dispersion:
64.500 angstroms
Reflection Reducing Surface:
Both
Polished Periphery:
Not provided
Bevel Angle In Deg:
Between 42.000 and 48.000
Material:
Glass, optical, mil-g-174, grade b, type 517-645
Material:
Glass, optical, mil-g-174, grade b, type 517-645
NSN:
1240-00-620-4979
Description:
Window,optical Instrument
Cage Code:

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 03/28/2024