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 6240-00-464-1874
NSN 5895-01-135-0728
NSN 6650-01-309-3462
NSN 6220-01-198-3218
NSN 4140-01-455-6664
NSN 5855-01-364-9810
NSN 5930-01-326-7791
NSN 5920-00-072-1492
NSN 5895-01-244-7434
NSN 6145-01-050-7531
NSN 5985-00-858-1290
NSN 5835-00-949-3018