beam splitter

noun

, Optics, Photography.

1. 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.

beam splitter

noun

1. a system that divides a beam of light, electrons, etc, into two or more paths

Word History and Origins

Origin of beam splitter¹

First recorded in 1930–35

Example Sentences

So, we had to adapt and set up two cameras side by side on a beam splitter system.

From Nautilus

This allowed the Xanadu researchers to design a silicon chip that implements a complex optical network made up of beam splitters, waveguides, and devices called interferometers that cause light sources to interact with each other.

From Singularity Hub 

After these alternative causal events have occurred, another beam splitter reunites the two versions of the photon.

From Quanta Magazine

Now swap balls for laser-emitted photons, pegs for beam splitters and mirrors, and slots for photodetectors.

From Singularity Hub 

Those devices include light sources, hundreds of beam splitters, dozens of mirrors and 100 photon detectors.

From Science News