| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a clear functional color without turbidity at lighting by providing a one-way diffusive diffusion optical element group on the outer surface of a lens (the surface facing the outer side of a lamp chamber inner part), and a colored opaque part on the inner surface of the lens (the surface facing the lamp chamber inner part). SOLUTION: A one-way diffusive diffusion optical element group 7 is provided on the surface of a lens 2 which faces the outer side of a lamp chamber 3 inner part, and a blue opaque part 8 having the complementary color relation with a color, for example, red of a color cap 11 is provided on the surface facing the lamp chamber 3 inner part. At lighting, the light from a light source bulb 4 forms a colored light reflected parallel by a reflecting surface 5 and transmitted by the color cap 11 or a colored parallel light reflected parallel by the reflecting surface 5, to provide the functional color of red of the color cap 11. In this case, the light reaching the colored opaque part 8 is not emitted from the lens 2, but the light reaching the part having no colored opaque part 8 is emitted as a clear functional color, to brighten the part of the diffusion optical element group 7 at high luminance as edge light.</p> |
