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 6620-00-075-6667
NSN 5990-00-104-4903
NSN 6105-00-257-2505
NSN 5950-01-082-9602
NSN 5935-01-321-0840
NSN 5930-01-400-6126
NSN 5935-01-138-4092
NSN 5960-00-614-3998
NSN 5996-00-905-6610
NSN 7035-01-116-6223
NSN 5895-01-322-1307
NSN 5910-01-318-4705