| 摘要 |
PURPOSE:To make letters and the like visible with the feeling of depth by providing the convex lens element region of converging type and the concave lens element region of diffusion type on the rear surface of a front lens, and irradiating a parallel beam to the aforesaid regions. CONSTITUTION:The whole rear surface of a front lens 33 is divided into concentric regions, and a converging type lens element (focus: F1) region S1 and a diffusion type lens element (focus: F2) region S2 are made to be adjacent to each other. A parabolic reflecting mirror 37 is placed behind the formation surface of the regions S1 and S2 on the lens 33, and the beam L of a light source 32 is projected to the formation surface of the regions S1 and S2 as a parallel beam. The focal points F1 and F2 can be changed in a stepped way or continuously via the change of the curvature of lens elements. According to the aforesaid constitution, the lens elements 35 and 36 are visible as if arrayed on the focus F1 surface and F2 surface, and that the feeling of depth in a stepped way. Accordingly, it is effective to apply the lighting fixture in the title to each signal light of a vehicle. |
