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单词 biprism
释义

WordReference Random House Unabridged Dictionary of American English © 2024
bi•prism  (bīpriz′əm),USA pronunciation n. [Optics.]
  1. Opticsa 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. Also called Fresnel biprism. 
  • bi-1 + prism 1880–85

Collins Concise English Dictionary © HarperCollins Publishers::
biprism /ˈbaɪˌprɪzəm/ n
  1. a prism having a highly obtuse angle to facilitate beam splitting
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