National Item Identification Number

01-358-6818
013586818
6650-01-358-6818
6650013586818

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)

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81395

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Reference Numbers (Part Numbers)

21049220-101

Required Categories

OVERALL LENGTH
OVERALL WIDTH
THE MANUFACTURERS DATA
MANUFACTURERS CODE
DESIG

Required Description

3.900 INCHES NOMINAL
0.900 INCHES NOMINAL
81395
21049220-101