| 摘要 |
<P>PROBLEM TO BE SOLVED: To expand a lamp viewing angle without increasing irregularity molding height of a prism surface of an inner lens. <P>SOLUTION: When partial parts of light rays emitted from light sources 50R and 60 arranged in lamp chambers 4R and 5 enter an inner prism surface 31 of the inner lens 30R, the partial parts of the light rays are refracted in required directions for expanding the viewing angle on the inner prism surface 31 and enter an outer prism surface 41 of an outer lens 40. The light rays refracted by the inner prism surface 31 are further refracted in the above directions in multiple steps by the outer prism surface 41 and emitted to the outside. Accordingly, the viewing angle of the light rays refracted by the outer prism surface 41 and finally emitted to the outside is largely expanded even if the irregularity molding heights of the respective prism surfaces 31 and 41 are small, and the light refraction angle of each single prism surface is small. <P>COPYRIGHT: (C)2010,JPO&INPIT |
