7660439

Optical instrument window

7660439 Description

0.990 inches width, 0.190 inches thickness, 1.557 inches length, all corners with a 0.310 in. Radius , glass, optical, mil-g-174, class 1, grade c, type 517-645 material.

Features

All corners with a 0.310 in. Radius

Properties of 7660439

Width:
Between 0.990 inches and 1.000 inches
Thickness:
Between 0.190 inches and 0.200 inches
Length:
Between 1.557 inches and 1.562 inches
Bevel Depth:
Between 0.020 inches and 0.030 inches
Refraction Index:
1.5170
Polished Surface:
Both
Dispersion:
64.5 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, class 1, grade c, type 517-645
Material:
Glass, optical, mil-g-174, class 1, grade c, type 517-645
Fsc Application Data:
Telescope, panoramic
NSN:
1240-00-864-2931
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 11/17/2024