| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily obtain various light distributions, and improve visibility by providing a light distribution converting belt which is formed of a transparent member so as to cover at least a part of a reflecting mirror and has plural optical characteristic different parts, and freely selecting the optical characteristic different parts to a front face of the reflecting mirror. SOLUTION: A light distribution converting belt 6 is arranged inside a box body formed of a lens 4 and a housing 5 so as to cover an almost upper half part of a reflecting mirror 3, and is positioned on a front face of the reflecting mirror 3 by selecting either of an undiffusive auxiliary cut part, a low diffusive auxiliary cut part and a high diffusive auxiliary cut part by a driving part 7 such as a motor. When the undiffusive auxiliary cut part covers an upper half part of the reflecting mirror 3, the reflected light of the reflecting mirror 3 is made incident still in its shape on the lens 4, and the spot lower light distribution having the narrowest lateral irradiation width is obtained. In the case of the low and high diffusive auxiliary cut parts, the intermediate low light distribution suitable for travel of a suburban district and the wide angle low light distribution suitable for travel of an urban district can be obtained.</p> |
