| 摘要 |
PURPOSE:To improve the visibility by sending much light to a surrounding pocket section with a flat reflection plate arranged near the entrance thereof so as to receive and admit the light into the pocket secton after reflected with a caustic curve-shaped reflection section provided in a lamp chamber. CONSTITUTION:The inner surface of a housing of a lamp house is so arranged that one section forms a curve so as to converge the light at a point while the section verticle to this secton forms a caustic curve-shaped reflector with a such a curvature as to make the light parallel. The caustic curve is positioned near the entrance of a surrounding pocket section in such a manner that the light is reflected with a flat reflector provided near the entrance to enter the pocket sectin 3. A reflecting function is provided for the portion other than the caustic curve secftion 4 on the inner surface of the housing 6 to better the visibility of a front lens 7. The inner surface of the front lens provides a frensnel lens 71 for contolling light. |
