有人认为采用无色配光镜的汽车方向指示灯会使得在明亮、阳光充足的条件下难以辨别该灯是否点亮。本研究从光度学角度分析了在明亮、阳光充足的条件下 ,采用琥珀色配光镜和无色配光镜的汽车方向灯在点亮和未点亮两种状态下的亮度对比和颜色对比。研究结果显示 ,当使用琥珀色配光镜时 ,灯在点亮和未点亮状态下的亮度对比较大 ;而使用无色配光镜时 ,颜色对比较大。由于亮度对比是影响驾驶员驾驶能力的主要因素 ,因此 ,这些结果表明在明亮、阳光充足的条件下 ,采用无色配光镜可能会使人难以区分灯是否点亮。然而 ,在实际操作中 ,采用无色配光镜的信号灯的负面影响的大小仍有待确定。 Some people think that using the car with a colorless light direction indicator will make it in bright, sunny conditions difficult to distinguish the light is lit. In this paper, from the photometric point of view, under bright, sunny conditions, the use of amber light and light with a light-free vehicle light direction indicator lights in the state of light and did not light under the brightness contrast and color contrast . The results show that when the amber light distribution lens is used, the brightness of the light in the lighting state and the non-lighting state are comparatively large. When the light distribution lens is used, the color contrast is larger. Since contrasting brightness is a major factor affecting the driver’s ability to drive, these results show that in bright, sunny conditions, the use of a colorless lens may make it difficult to distinguish between lights. However, in practice, the size of the negative impact of a signal light using a colorless light-distribution mirror remains to be determined.