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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:

They can be made to do so with a beam splitter, a half-silvered mirror set at an angle that will, with equal probability, transmit a photon or deflect it by 90°.

From Science Magazine May 6, 2024

However, the light in one arm of the interferometer reflects off the surface of the beam splitter while the light in the other passes through it.

From Science Magazine Dec. 15, 2021

After going through the beam splitter, the particle enters into a superposition of two states: taking the left and right paths.

From Scientific American May 6, 2019

Wheeler realized that experimenters could even wait to remove the second beam splitter until after the photon had passed the first beam splitter.

From Science Magazine Oct. 27, 2017

One might suspect that photons simply assume one of two behaviors—wave or particle—beforehand, or when they hit the beam splitter.

From Scientific American Nov. 6, 2012

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