optical prism

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Noun1.optical prism - optical device having a triangular shape and made of glass or quartzoptical prism - optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
biprism - an optical device for obtaining interference fringes
erecting prism - a right-angled optical prism used to turn an inverted image upright
optical device - a device for producing or controlling light
prism spectroscope, spectroscope - an optical instrument for spectrographic analysis
telescope, scope - a magnifier of images of distant objects