National Stock Number:
6650-01-357-2543
Federal Supply Class:
6650
National Item Identification Number:
013572543
Description:
IRIS DIAPHRAGM,OPTICAL INSTRUMEN
Detail:
AN ADJUSTABLE ITEM OF THIN, OVERLAPPING OPAQUE PLATES WHICH ARE ACTUATED BY A RING OR OTHER DEVICE SO AS TO CHANGE THE DIAMETER OF A CENTRAL OPENING, FOR CONTROLLING THE INTENSITY OF TRANSMITTED ILLUMINATION. IT IS USUALLY EMPLOYED TO REGULATE THE APERTURE OF A LENS IN MICROSCOPES, AND OTHER OPTICAL INSTRUMENTS.
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