| 摘要 |
<p>An automobile headlight has a plastic headlamp glass (1), sealed (at 3) to a primary reflector (2) moulded of a polycarbonate material. The primary reflector is protected against the disadvantageous effects of overheating (e.g. softening and deformation) by the presence of an aluminium secondary reflector (9) surrounding the light bulb (20) and defining a "visor" (9b) shielding the top of the primary reflector (2). Air flow passages (16) exist to permit air circulation within the headlight to equalise temperatures between the hot secondary reflector (9), the cold headlamp glass (1), and the temperature-sensitive primary reflector (2). <IMAGE></p> |
