| 摘要 |
<p>A lens element for a vehicle lamp e.g. a direction indicator lamp consists of a moulded transparent plastics body (10) provided with parallel rows of projections (11) each of which has the form of part of a body of revolution or a cylindrical mid-region and end regions which each have the form of part of the body of revolution of the mid-region.</p><p>In order to produce the required light output in the direction of the longitudinal axis of the vehicle in the case where the lens element is used in a lamp assembly having a relatively inefficient reflector, the lens element is provided with a plurality of ribs (12) which extend parallel to the rows of projections and which are longer than the projections (11). The ribs (12) preferably alternate with the rows of projections (11) and may extend for the whole or only part of the length of the lens element.</p> |
