| 摘要 |
A multi-purpose visual signaling device, particularly for road emergency warning and in low visibility conditions, comprises light-emitting means ( 3 ) for generating a light beam ( 4 ) and means ( 5 ) for supplying power to light-emitting means ( 3 ). The light-emitting means ( 3 ) include at least one laser projector ( 6 ) adapted to project images ( 7 ) over a substantially flat surface for such images to be visible from a relatively long distance. The light-emitting means ( 3 ) and the power supply means ( 5 ) are mounted to a stationary support structure ( 2 ) which may include a front warning triangle-defining portion ( 12 ). The laser projector ( 6 ) comprises at least one laser diode ( 8 ) and optical and/or electronic means ( 9 ) for generating images ( 7 ) in space or over a substantially flat surface. The optical and/or electronic means ( 9 ) comprise a diffractive lens ( 10 ). Images ( 7 ) include monochromatic, polychromatic and/or holographic images, possibly of variable configuration, and preferably form a triangular design.
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