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.
Also called Fresnel biprism.

Origin of biprism

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

Words nearby biprism

bipolar neuron, bipolar transistor, bipolar version, bipotentiality, bippy, biprism, bipropellant, bipyramid, biquadrate, biquadratic, biquarterly

Example sentences from the Web for biprism

British Dictionary definitions for biprism

biprism
/ (ˈbaɪˌprɪzəm) /

noun

a prism having a highly obtuse angle to facilitate beam splitting