lysbrydningsindretning with rotating prisms for optical devices, for example. a lysprojektor

摘要

A device presenting a disk (23) supporting two prisms (34, 36) and rotating about an axis (24) offset in relation to the path (14) of an incident beam. One (36) of the two prisms (34, 36) is in the shape of part of a circle, and presents a series of faces (53) in the form of parallel portions of the circle, and which are inclined, in relation to a plane perpendicular to their axis, by an angle increasing gradually towards the peripheral face of the prism (36). The disk (23) and the two prisms (34, 36) are rotated by two electric motors (55, 60) via respective gear assemblies (56, 61); and the disk (23) is fitted to a shaft (27) also fitted with a gear (59) of the respective gear assembly (56). Each of the two prisms (34, 36) is integral with a ring gear (43), and the respective gear assembly (61) presents a gear (64) rotating on the shaft (27) of the disk (23) and meshing simultaneously with both ring gears (43). IMAGE IMAGE