| 摘要 |
<p>The invention relates to an element (1) made of transparent material for varying the light rays from an illuminating means (10), whereby light rays (B) hitting the element at an angle of more than 45 DEG from the optical axis of the element are deflected at least partly so as to be emitted by the element at an angle of less than 45 DEG (B'). <IMAGE></p> |
