iris diaphragm en · NOUN
Etymology
Derives from its action which is reminiscent of the iris of the eye.
Meanings
- An adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| iris diaphragms | Number=Plur | lexicographic |
Translations (2)
de Irisblende (adjustable diaphragm) · tl alikmata (adjustable diaphragm)