Dove prism

noun Optics.

a prism that inverts a beam of light, often used in a telescope to produce an erect image.

Origin of Dove prism

named after Heinrich W. Dove (1803–79), German physicist
Also called erecting prism, reversing prism, rotating prism. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019