| 摘要 |
Device for deviating light comprising two optical prisms driven in a rotating movement about a same axis, each of these prisms having an opaque sleeve crossing it from one face to the other and surrounding the rotating axis, and a method for producing prisms for the deviating device, consisting more particularly in positioning an opaque substance in a cylindrical groove formed in a transparent plate, and in dividing the plate in two parts along a transversal plane.
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