White light transmission to be at least 25 pct; optical density at 0.6943 microns to be at least 5.0; light deviation not to exceed 2 min of arc; surface quali type 80-50 per military specification mil-0-13830; both flat surfaces polished; chamfer edges 45 deg
An item having two plane-parallel surfaces and used in the telescopic system of an optical instrument to modify the density or spectral intensity of light by absorption. Several filters having varied characteristics are usually mounted in such a manner that any selected filter may be moved in or out of the optical axis as light conditions warrant. Excludes window, optical instrument.
Classification: Military equipments not identified by kind
NSN 5990-01-201-1698
NSN 6685-01-513-0798
NSN 5950-00-339-4279
NSN 5855-01-287-6391
NSN 5999-00-673-5546
NSN 6105-01-307-8086
NSN 6220-01-660-5902
NSN 5920-01-151-4368
NSN 5996-00-181-0207
NSN 5996-00-221-7663
NSN 6110-00-596-9124
NSN 5999-01-591-0171