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 6135-00-484-8556
NSN 6105-01-512-8752
NSN 6650-01-132-0737
NSN 5996-01-463-4745
NSN 7035-00-215-3272
NSN 7035-01-169-1166
NSN 5930-01-281-7696
NSN 6610-00-561-9360
NSN 5960-00-850-0219
NSN 6105-01-578-7537
NSN 5905-01-646-0950
NSN 5996-01-226-0606