biprism

[ bahy-priz-uh m ]
/ ˈbaɪˌprɪz əm /
|

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.

Nearby words

  1. bipolar transistor,
  2. bipolar version,
  3. bipolarity,
  4. bipotentiality,
  5. bippy,
  6. bipropellant,
  7. bipyramid,
  8. biquadrate,
  9. biquadratic,
  10. biquarterly

Origin of biprism

First recorded in 1880–85; bi-1 + prism

Also called Fresnel biprism.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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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