roof prism

Definition: Type of prism consisting of a roof-shaped profile on the long, parallel-sided reflecting faces of a right-angle prism. * It erects an inverted image (or inverts an erect image) and bends the line of sight through 90!. * Used as an erecting system in telescopes and some designs of binoculars. * Designed by G.B. Amici. * Also known as Amici prism.

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