| 摘要 |
A front surface 14a of a lens 14 is divided into 48 front surface areas 14a1, 14a2, 14a3 via ridge lines R1 to R5, and a rear surface 14b of the lens 14 is divided into 48 rear surface areas 14b1, 14b2, 14b3 via trough lines T1 to T5. The individual rear surface areas 14b1, 14b2, 14b3 are formed so as to have surface shapes which are set so that light from a predetermined point A which is positioned on a light source 12 is caused to reach zones on the individual front surfaces areas 14a1, 14a2, 14a3 which correspond to the individual rear surface areas 14b1, 14b2, 14b3, the zones each lying centrally inwards apart from the ridge lines which define the circumference of each of the front surface areas. |
| 主权项 |
1. A vehicular lamp comprising:
a light source; and a lens disposed at a front side of the light source and configured to form a predetermined lamp light distribution pattern by controlling a deflection of light emitted from the light source, wherein a front surface of the lens is divided into a plurality of front surface areas via ridge lines, wherein a rear surface of the lens is divided into a plurality of rear surface areas by trough lines which is the same number as the plurality of front surface areas, wherein the rear surface areas are formed so as to have surface shapes which are set so that light which is emitted from a position situated on the light source or near the light source and then incident on the lens from the rear surface areas is caused to reach zones on the plurality of front surface areas which correspond to the plurality of rear surface areas, the zones each lying centrally inwards apart from the ridge lines which define the circumference of each of the front surface areas, wherein the front surface areas are formed so as to have surface shapes which are set so that light which is emitted from the predetermined point and then reaches the front surface areas via the corresponding rear surface areas is emitted into predetermined directions from the individual front surface areas, and wherein the lamp light distribution pattern is formed as a combined light distribution pattern of a plurality of light distribution patterns which are formed by a combination of the individual rear surface areas and the individual front surface areas. |
