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 6110-01-023-2248
NSN 6610-00-420-8475
NSN 5920-00-228-1807
NSN 2925-01-658-3957
NSN 6240-01-401-5340
NSN 6620-00-317-7820
NSN 5985-01-596-1181
NSN 6105-01-195-8225
NSN 6645-01-352-5675
NSN 5935-01-183-3900
NSN 6220-01-009-2475
NSN 6135-00-871-3646