The optical system comprises an optical component with an active part (1) made of an optically transparent material, a collimating element (2) and a light unit (3) to emit light rays (10) to the collimating element (2) to collimate light rays (10) and to direct them to the active part (1). Generally, the active part (1) has an output surface (12) on its front side for the output of light rays (10) out of the active part (1) towards the display surface (ZY) situated at a distance in front of the active part (1). Furthermore, the active part (1) comprises optical elements (13) whose output surfaces (15) are part of the output surface (12) to create light patterns (A) on the display surface (ZY). The optical elements (13) consist of convergent lenses (13a) and/or divergent lenses (13b), the optical elements (13) being arranged after each other in rows situated next to each other.