这是根据光线定向照射原理设计的汽车前灯,其特点是灯光只照射车灯水平面以下的路面,因而不会照到会车司机的眼睛。 该灯的反光面是半圆弧和抛物线相连接的曲线形成的曲面。圆弧的圆心和抛物线的焦点重合,该点也正是光源的 This is a car headlight designed according to the principle of directional light irradiation, which is characterized by the fact that the light shines only on the road surface below the level of the headlight and therefore will not shine on the driver’s eye. The reflective surface of the lamp is a curved surface formed by a curve connecting a semicircular arc with a parabola. The center of the arc coincides with the focus of the parabola, which is also the source of the light