Abstract: One subject of the invention is a light guide (13), for an interface module, in particular for a vehicle passenger compartment, for emitting or receiving a light beam in a cone that is elongate in a transverse direction and that is centred on a plane that is inclined by an angle ? with respect to an optical axis (z) of the light guide, taking the form of a prism made of transparent material of index nGL, characterised in that it comprises: •an interior dioptric interface intended to face a printed circuit board (7) bearing a light source (5) or a light detector, forming a convergent lens the focal point of which is located at an expected position of the light source (5) or of the light detector, •a first planar face (15) that is oriented parallel to the optical axis (z) of the light guide, and •a second planar face (17) that is inclined with respect to the first face (15) by an angle ? respecting cos(?+?)=(1??) nGL*cos 3?, with ? a number comprised between ?0.1 and 0.1.

Abstract: The invention relates to a device for generating light, in particular for a vehicle passenger compartment ceiling lamp (100), comprising: a separating tube (7) made of a material that is opaque to the radiation used, which is intended to be placed in an aperture (101) forming an exit for the illuminating light, is tubular along an axis orthogonal to the aperture and is of “c”-shaped radial cross section, forming an axial window (71), a bounding light guide (53) encircling the separating tube (7) having an annular exit dioptric interface (55), a base (57) in the axial extension of the exit dioptric interface, axial extensions (59), extending axially at least in segments the base (57), comprising entrance dioptric interfaces (61), which are placed facing bounding light sources (51), an illuminating light guide (33), which is located axially facing the illuminating light source (31) of the separating tube and axially removed from the aperture (101) comprising an entrance dioptric interface (35), which is placed

Abstract: The invention relates to a device for generating light, in particular for a vehicle passenger compartment ceiling lamp (100), comprising: a separating tube (7) made of a material that is opaque to the radiation used, which is intended to be placed in an aperture (101) forming an exit for the illuminating light, is tubular along an axis orthogonal to the aperture and is of “c”-shaped radial cross section, forming an axial window (71), a bounding light guide (53) encircling the separating tube (7) having an annular exit dioptric interface (55), a base (57) in the axial extension of the exit dioptric interface, axial extensions (59), extending axially at least in segments the base (57), comprising entrance dioptric interfaces (61), which are placed facing bounding light sources (51), an illuminating light guide (33), which is located axially facing the illuminating light source (31) of the separating tube and axially removed from the aperture (101) comprising an entrance dioptric interface (35), which is placed

Abstract: One subject of the invention is a light guide (13), for an interface module, in particular for a vehicle passenger compartment, for emitting or receiving a light beam in a cone that is elongate in a transverse direction and that is centred on a plane that is inclined by an angle ? with respect to an optical axis (z) of the light guide, taking the form of a prism made of transparent material of index nGL, characterised in that it comprises: •an interior dioptric interface intended to face a printed circuit board (7) bearing a light source (5) or a light detector, forming a convergent lens the focal point of which is located at an expected position of the light source (5) or of the light detector, •a first planar face (15) that is oriented parallel to the optical axis (z) of the light guide, and •a second planar face (17) that is inclined with respect to the first face (15) by an angle ? respecting cos(?+?)=(1??)nGL*cos 3?, with ? a number comprised between ?0.1 and 0.1.