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biprism

[ bahy-priz-uhm ]

noun

, Optics.
  1. 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.

biprism

/ ˈbaɪˌprɪzəm /

noun

  1. a prism having a highly obtuse angle to facilitate beam splitting

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Word History and Origins

Origin of biprism1

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

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Example Sentences

In lieu of the biprism, reflectors may be invoked to double the original source of light.

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