| 摘要 |
<p>In a motor vehicle lamp of the type comprising a body (2), a bulb (3) within the body (2), a transparent glass (4) having a prismatic internal surface (5) for receiving light rays emitted by the bulb (3) and focusing them outwardly in a beam having predetermined characteristics, and a coloured filter (11) interposed between the bulb (3) and the transparent glass (4), the prismatic internal surface (5) of the transparent glass (4) includes diffusing lenses adapted to scatter light rays passing through the transparent glass (4) from the exterior in all directions within the body (2) of the lamp. The lamp further includes an internal reflective wall (17) for reflecting the light rays scattered within the lamp body (2) over the entire surface of the transparent glass (4), so as to prevent the coloured filter (11) from being visible from the exterior when the bulb (3) is off and the lamp is illuminated from the exterior. In a first embodiment, the internal reflective wall (17) lies in a plane between the bulb (3) and the transparent glass (4) and has a central aperture (13a) with dimensions such as to allow the passage of only those light rays coming directly from the bulb which are incident on the surface of the transparent glass. In a second embodiment the internal reflective wall is in the form of a conical wall which surrounds the lamp bulb.</p> |
