biprism

English Thesaurus

1. an optical device for obtaining interference fringes (noun.artifact)

hypernym	:	optical device,
definition	:	a device for producing or controlling light (noun.artifact)

part holonym	:	optical prism, prism,
definition	:	optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image (noun.artifact)