Abstract: An optical device including a support mounted on a rotational-drive motor, and a reflective optical component, the support including at least one sleeve coaxial with the rotational-drive axis, of which sleeve one end defines an inlet orifice and which sleeve in its wall includes an opening defining an outlet orifice, and inside which sleeve the reflective optical component is housed in such a way that a beam of light entering via the inlet orifice is reflected by the reflective optical component to exit via the outlet orifice. An optical component mounted and retained in the sleeve as a result of cooperation of shape between it and the wall of said sleeve is also discussed.

Abstract: A light unit configured to emit at least one wide-aperture light beam including a transmitter system, configured to emit at least one light beam, the beam(s) being emitted in an angular range of 360° around the transmitter system; a reflector system surrounding the transmitter system, arranged to receive each light beam propagating from the transmitter system and to reflect each light beam received towards the outside of the light unit. The reflector system includes a frame surrounding the transmitter system and bearing a reflecting surface extending around the transmitter system between two opposite edges of the frame, the reflector system and/or the transmitter system are mounted such that they can be moved relative to one another and such that they can be positioned relative to one another so as to modify the interception area of the beam emitted by the transmitter system along the reflecting surface of the reflector system.

Abstract: An optical device including a support mounted on a rotational-drive motor, and a reflective optical component, the support including at least one sleeve coaxial with the rotational-drive axis, of which sleeve one end defines an inlet orifice and which sleeve in its wall includes an opening defining an outlet orifice, and inside which sleeve the reflective optical component is housed in such a way that a beam of light entering via the inlet orifice is reflected by the reflective optical component to exit via the outlet orifice. An optical component mounted and retained in the sleeve as a result of cooperation of shape between it and the wall of said sleeve is also discussed.