beam splitter
noun Optics, Photography.
a mirror or prism that divides a beam of light into two parts by reflecting a part of the beam, used in camera range finders.
Origin of beam splitter
First recorded in 1930–35
Words nearby beam splitter
beam lights,
beam mill,
beam reach,
beam riding,
beam sea,
beam splitter,
beam trawl,
beam weapon,
beam wind,
beam-ends,
beam-power tube
British Dictionary definitions for beam splitter
beam splitter
noun
a system that divides a beam of light, electrons, etc, into two or more paths