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Dispositivo visor, que se caracteriza por que comprende una lente formada por un prisma, preferentemente de sección triangular, una de cuyas caras es plana y la otra cara cóncava y vaciada en el cuerpo del propio prisma; las caras laterales de la lente están mateadas, a fin de evitar interferencias de luz.
Procedimiento obtener la apariencia del relieve en proyecciones cinematograficas con los dispositivos opticos aplicables a las maquinas de toma de vistas y proyeccion y pantalla especial para su aplicacion