National Item Identification Number
01-318-3831
013183831
5210-01-318-3831
5210013183831
National Stock Number
Item Name
OPTICAL FLAT
Federal Supply Class
5210
Description
A flat, transparent piece of glass, generally of fused quartz, with one or both principal surfaces polished to within a few millionths of an inch of a true plane. It is used in conjunction with a monochromatic light source to measure the flatness of precision finished surfaces, and to determine the distance and parallelism between precision finished surfaces by comparison with known standards. In operation the flat is superimposed, reference surface downward, on the parts under test and when illuminated by monochromatic light the rays reflected from the reference surface are either reinforced or neutralized by the rays reflected from the surface under test producing interference bands which reveal any variations in the thickness of the film of air between surface under test and the flat. Excludes optical parallels.
Commercial and Government Entity Code (Supplier Data)
54081
MELLES GRIOT INC
16542 MILLIKAN AVE
IRVINE
CA
92606
949-261-5600
Reference Numbers (Part Numbers)
02FPS015
Required Categories
DESIGN TYPE
MATERIAL
III END ITEM IDENTIFICATION
THE MANUFACTURERS DATA
MANU
Required Description
WORKING DOUBLE
QUARTZ, FUSED
OPTICS TEST STATION
54081
02FPS015