Examlex
The most easily adjusted radiographic beam-restricting device is the
Millimeters
A unit of length in the metric system, equal to one thousandth of a meter.
Iris Diaphragm
A thin, adjustable circular structure in optical devices or the eye that controls the amount of light passing through by changing its size.
Condenser
A device used to condense a gas or vapor into a liquid.
Ocular Lens
The lens closest to the eye in a microscope or telescope, through which the viewer looks to magnify the image formed by the objective lens.
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