Patent ID: 7651246

Claim:
An optical module for the projection of a light beam, comprising a light source ( 10 ) and a solid body ( 1 ) of transparent material having a principal axis (z), in which is formed a cavity ( 13 ) for receiving the light source ( 10 ), the said cavity ( 13 ) extending along the said principal axis (z) of the transparent body ( 1 ) and being delimited laterally by a radially inner surface ( 3 ) and at one end by a terminal surface ( 2 ) of the transparent body ( 1 ), the said surfaces ( 2 , 3 ) being configured to receive respective separate portions (I, II) of the light flux generated by the said source ( 10 ), in which the transparent body ( 1 ) further has a radially outer surface ( 4 ) which is disposed in such a way as to surround the said radially inner surface ( 3 ), the said radially outer surface ( 4 ) being configured to reflect the portion of the light flux (I) coming from the radially inner surface ( 3 ) in a direction substantially parallel to the principal axis (z) of the body ( 1 ) and in which the transparent body ( 1 ) has on the side opposite that of the cavity ( 13 ), a central surface ( 6 ) and an annular surface ( 5 ) surrounding the said central surface ( 6 ), configured to receive, respectively, the portion of the light flux (II) coming from the terminal surface ( 2 ) and the portion of the light flux (I) reflected by the radially outer surface ( 4 ) and to transmit the said light flux portions (I, II) in directions having predetermined orientations with respect to the principal axis (z) of the transparent body ( 1 ); wherein at least one of the said surfaces ( 2 , 3 , 5 , 6 ) is rotationally non-symmetric with respect to the said principal axis (z) of the transparent body ( 1 ), the said surfaces ( 2 , 3 , 5 , 6 ) cooperating in such a way as to conform the overall light flux (I, II) exiting from the said central and annular surfaces ( 6 , 5 ) into a light intensity distribution output having a horizontal spread in a first direction perpendicular to the principle axis and a vertical spread in a second direction perpendicular to the principle axis and perpendicular to the first direction, the horizontal spread in the first direction being different than the vertical spread in the second direction; wherein said radially outer surface ( 4 ) is joined to the radially inner surface ( 3 ) by a substantially flat connecting surface ( 9 ) perpendicular to the said axis (z) of the transparent body ( 1 ), the said light source being disposed flush with the said connecting surface ( 9 ), and wherein said central surface ( 6 ) is designed so as to receive the entire and only portion of the light flux (II) coming from the terminal surface ( 2 ).