Definitions for: Iris Diaphragm


[n] diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening



Webster (1913) Definition: I"ris di"a*phragm
An adjustable diaphragm, suggesting the iris of the eye in
its action, for regulating the aperture of a lens, consisting
of a number of thin pieces fastened to a ring. It is used in
cameras and microscopes.

Synonyms: iris

See Also: diaphragm, stop

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