Optical Instrument Window

Model / MPN: 181146PC1 | NSN: 1240-00-171-4220

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.

Product Details

NATO Stock Number

1240-00-171-4220

Sold in multiples of

1 EA

DEMIL

DEMIL/MLI

Diameter

Between 2.5886 inches and 2.5984 inches

Thickness

0.3937 inches

Length

Between 3.4941 inches and 3.5039 inches

Refraction Index

1.5170

Polished Surface

Both

Dispersion

64.5 angstroms

Reflection Reducing Surface

Both

Polished Periphery

Not provided

Material

Glass, mil-g-16592, grade b

Material

Glass, mil-g-16592, grade b

Fsc Application Data

Periscope mk 23, mod 0

181146PC Series Parts

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Optical Instrument Window

Pricing and Availability

Certified Quality Assurance

181146PC1 Cross Reference