Optical Instrument Window

Model / MPN: 181146PC9 | NSN: 1240-00-171-7897

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

1240-00-171-7897

Sold in multiples of

1 EA

DEMIL

DEMIL/MLI

Diameter

Between 45.960 millimeters and 48.000 millimeters

Thickness

3.000 millimeters

Bevel Depth

1.000 millimeters

Refraction Index

1.5171

Polished Surface

Both

Dispersion

64.5 angstroms

Reflection Reducing Surface

Both

Polished Periphery

Not provided

Bevel Angle In Deg

45.000

Material

Glass, optical, jan-g-174, type 517-645, grade a

Material

Glass, optical, jan-g-174, type 517-645, grade a

Fsc Application Data

Periscope mk 23 mod 0 and mk 24 mod 0

181146PC Series Parts

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Optical Instrument Window

Pricing and Availability

Certified Quality Assurance

181146PC9 Cross Reference