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 6240-00-985-3316
NSN 5925-00-841-6817
NSN 5975-01-099-3784
NSN 6610-00-264-0961
NSN 6610-01-064-5792
NSN 6145-01-229-0326
NSN 5998-00-954-8046
NSN 6130-00-223-2099
NSN 5855-01-264-8599
NSN 6105-00-817-4809
NSN 6620-01-606-2002
NSN 5990-00-197-0159