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biprism

[ bahy-priz-uhm ]
/ ˈbaɪˌprɪz əm /
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noun Optics.

a triangular prism with an apex angle slightly less than 180°: when illuminated by a point source of light it produces two overlapping beams that form an interference pattern on a screen.

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Also called Fresnel biprism.

Origin of biprism

First recorded in 1880–85; bi-1 + prism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use biprism in a sentence

British Dictionary definitions for biprism

biprism
/ (ˈbaɪˌprɪzəm) /

noun

a prism having a highly obtuse angle to facilitate beam splitting
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
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