| 摘要 |
PROBLEM TO BE SOLVED: To irradiate back and front parts without dispersing a light pencil reflected by a parabola 3 in a headlight for a bicycle. SOLUTION: On a light bulb 2 opposite position of a front lens 4, a convex lens 4b for irradiating light from a light bulb 2 as a light pencil X lower than a light pencil Y reflected forward by a parabola 3 is formed. |
