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beam splitter

American  

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 British  

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of beam splitter

First recorded in 1930–35

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

In their experiment, preselected neutrons with a particular spin were sent, one by one, into a beam splitter, which is a device that splits a beam of particles into two.

From Scientific American May 6, 2019

The thought experiment involves putting two interferometers side by side, such that each particle first encounters a beam splitter.

From Scientific American May 6, 2019

A second beam splitter then recombines the waves, which interfere with each other to shunt the photon toward either one of a pair of detectors.

From Science Magazine Oct. 27, 2017

As the paths cross where the second beam splitter would have been, the detectors click with equal probabilities regardless of the paths’ lengths.

From Science Magazine Oct. 27, 2017

Remove the second beam splitter and interference becomes impossible.

From Science Magazine Oct. 27, 2017

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