National Item Identification Number
01-249-3201
012493201
6650-01-249-3201
6650012493201
National Stock Number
Item Name
FILTER,LIGHT,INTERFERENCE
Federal Supply Class
6650
Description
A light transmitting item consisting of a transparent, flat glass body having two plane-parallel surfaces, either with only nonabsorbing dielectric coatings or absorbing and nonabsorbing coatings of a thickness nearly equivalent to the wavelength of the transmitted light. Interference begins at the thin bordering surfaces of the coatings, the penetrating light waves being superimposed on the reflected light waves. The item can be installed in various optical insturments, to serve as an eye protecting device.
Commercial and Government Entity Code (Supplier Data)
76301
Reference Numbers (Part Numbers)
74D111179-2009
Required Categories
III END ITEM IDENTIFICATION
Required Description
MCDONNELL DOUGLAS ACFT CO,ALIGNMENT SET