| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicular headlight in which light distribution patterns can be changed without installing a movable portion, respective light distribution patterns adapted to characteristics respectively required for high beam and low beam are formed, glare light is not generated when the low beam is formed, and a light utilization efficiency is made higher compared with a conventional one. <P>SOLUTION: The vehicular headlight 1 includes: a bulb 4 having a first filament 41 and a second filament 42; a parabolic first reflecting face 51 having a focus F1 in the vicinity of the first filament 41; an ellipsoidal second reflecting face 61 which has a first focus F21 in the vicinity of the second filament 42 and in which the light emitted from the second filament 42 is reflected to the second focus F22; and a parabolic third reflecting face 71 having a focus F3 in the vicinity of the second focus F22 of the second reflecting face 61. The bulb 4 has a cup 43 in the vicinity of the first filament 41 to shade the light from the first filament 41 to the second reflecting face 61. <P>COPYRIGHT: (C)2012,JPO&INPIT |
